Cmos Power Battery Cable for Dell Inspiron 5410 5418 5505 5510 5511
4.5Editor score
Wide Dell and HP coverage
Three compatible part numbers
Cable-style installation
In this guide
A replacement motherboard CMOS battery is a small but essential laptop component that preserves BIOS settings, system time, and configuration data when the main battery is disconnected or depleted. Choosing the right replacement requires checking the laptop model, connector style, voltage, dimensions, and original part number before ordering any part.
This guide compares ten replacement CMOS RTC batteries and rechargeable cells selected for Dell, HP, ASUS, Toshiba, and other compatible laptop systems. Compatibility information, supported model numbers, electrical specifications, product ratings, testing claims, and warranty details form the basis of the comparison, making clear where each option is most appropriate.
Each review identifies the systems covered by the battery, highlights its strongest practical qualities, and notes any limitations visible in the supplied information. The top selections represent a cable-style option, a broadly listed HP-and-Dell replacement, and a Toshiba option with a strong customer rating. Availability and prices can change, so readers should confirm current listings before purchasing.
Top 3 Picks for Best Replacement Motherboard Cmos Battery
Replacement CMOS RTC Battery for HP Elitebook 8460p 8460w 8770w Probook 6460b 651948-001
4.3Editor score
Specific HP laptop compatibility
Six-month repair warranty
Direct replacement format
HQRP CMOS RTC BIOS Battery Compatible with Toshiba Satellite
5.0Editor score
Extensive Toshiba model coverage
Detailed electrical specifications
Two-hundred-day warranty
Top 10 Best Replacement Motherboard Cmos Battery in 2026 Compared
This side-by-side comparison organizes all ten products by their most important practical details: intended laptop systems, battery format, stated electrical characteristics, compatibility identifiers, and warranty coverage. It is designed to make model verification easier before installation and to distinguish direct replacements from generic rechargeable cells.
ProductsSpecificationsEditor scorePrice
Best Budget
Dell and HP CMOS Cable
Cable-style CMOS replacement
Broad Dell and HP support
Three listed part numbers
4.5 customer rating
4.5Editor score
Editor's Choice
ASUS Q504 CR1220W Battery
ASUS Q504 and Q524 models
CR1220W rechargeable format
Tested before shipping
No customer rating listed
Editor's Choice
HP EliteBook and ProBook Battery
HP EliteBook and ProBook support
Part number 651948-001
Six-month repair warranty
4.3 customer rating
4.3Editor score
Dell Inspiron and Latitude Battery
Dell Inspiron model support
Dell Latitude 3470 support
Part number 23.21212.031
Six-month repair warranty
4.0Editor score
HP ProBook and Stream Battery
HP ProBook model coverage
HP Stream model coverage
CR2016W rechargeable format
Tested before shipping
HP ZBook 14 G2 Battery
HP ZBook 14 G2 support
HP ZBook 15u G2 support
Part number 665733-001
Six-month repair warranty
4.1Editor score
40mAh 3.6V Ni-MH Cell
40mAh rated capacity
3.6 volt rating
Ni-MH rechargeable chemistry
Universal cell format
3.9Editor score
ASUS ZenBook CR1220W Battery
Multiple ASUS notebook families
CR1220W rechargeable format
Tested before shipping
No customer rating listed
40mAh 4.8V Ni-MH Cell
40mAh rated capacity
4.8 volt rating
Ni-MH rechargeable chemistry
11.8 by 22 millimeter size
1.0Editor score
Toshiba Satellite CMOS Battery
Extensive Toshiba Satellite support
2.4 volt and 20mAh ratings
Ni-MH rechargeable chemistry
Two-hundred-day warranty
5.0Editor score
1. Dell and HP CMOS Cable – Broadest Listed Compatibility
Dell and HP CMOS Cable
Cable-style replacement battery
Broad Dell and HP coverage
Three listed part numbers
4.5 customer rating
This cable-style CMOS power battery is the broadest all-in-one option in the guide, with a 4.5 customer rating and a compatibility list spanning numerous Dell Inspiron, Dell Vostro, Dell Latitude, HP Pavilion, HP EliteBook, HP ProBook, and HP Envy systems. Its main advantage is the large number of named models and three listed manufacturer part numbers: 23.21212.031, 651948-001, and 691572-001.
Pros
- Extensive model list
- Useful cross-brand coverage
- Includes three part numbers
- Strong customer rating
- Photo-based verification advice
Cons
- Cable form may not suit all systems
- Very long compatibility list
- No stated voltage or capacity
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The product appears especially useful for a technician who wants one listing to cover several common office laptops. The supported Dell range includes the Inspiron 5410, 5418, 5505, 5510, 5511, 5515, 5518, 5368, 5378, 7368, 7378, 7370, 7569, 7500, 7501, 7570, and 7580, along with additional models. It also lists Vostro 5501, 5502, 5510, and 7500, plus Latitude 3300, 3301, 3310, 3330, 3340, 3410, 3470, 3480, 3540, 3570, 3580, 5310, and 5420.
HP coverage is similarly broad. The listing names Pavilion 13-U M3-U, 11-U, 15-AS, and 14-AM; EliteBook 8460w, 8460P, and 8470p; ProBook 6465b, 6470B, 640, 645, 650, 655, and G1, G2, and G3 variants; and Envy 15-J, 17-J, M6-N, 15-Q, and M7-J. That breadth is valuable, although the number of names makes careful confirmation essential. The seller specifically advises comparing both the laptop model and product picture before purchase.
This is a strong candidate for owners of a listed Dell or HP model who recognize one of the three part numbers. The trade-off is that no voltage, capacity, connector dimensions, or warranty duration appears in the supplied information, so buyers cannot assess those aspects from the listing alone. It is also a cable rather than a simple coin-cell substitute. Overall, the extensive supported-model list and strong rating make this the most versatile-looking budget choice, provided the exact model and picture match.
One Listing, Numerous Office Laptops
The extensive Dell and HP model coverage is the defining benefit. It may reduce the need to search multiple listings when servicing several compatible business notebooks, while the three part numbers offer useful alternatives for identification.
Verify the Cable and Part Number
A cable-style battery must match the board connection and placement. Compare the model, one of the listed part numbers, and the product picture before ordering to reduce the risk of an incompatible replacement.
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2. ASUS Q504 CR1220W Battery – Focused Model-Match Replacement
ASUS Q504 CR1220W Battery
ASUS Q504 and Q524 models
CR1220W rechargeable format
Tested before shipping
Model verification required
This CR1220W replacement is designed for the ASUS Q504, Q504UA, Q524, and Q524UQ families. It is a focused option rather than a universal battery, and the supplied listing does not include a customer rating. Its strongest documented attributes are that the product is tested before shipping and is intended to replace a faulty, cracked, or broken RTC battery.
Pros
- Focused ASUS model coverage
- Tested before shipment
- Rechargeable CR1220W format
- Seller compatibility support
Cons
- No customer rating listed
- No warranty duration stated
- Limited to specified ASUS models
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Compatibility is the main reason to consider this listing. ASUS users should confirm that the complete model designation exactly matches the product description rather than relying only on a similar-looking Q-series label. The seller emphasizes that different models are not automatically compatible, which is sensible advice because motherboard layouts, battery formats, and connector arrangements can vary even within a product family.
Installation should occur with the laptop powered off, as the seller specifically recommends. A dedicated replacement also lets a user address a swollen, leaking, cracked, or otherwise damaged RTC cell without replacing the entire motherboard. However, the supplied information does not state voltage, capacity, physical dimensions, connector details, or a warranty period, so buyers will need to validate those points with the seller or their own laptop documentation.
This battery is best for an owner of one of the explicitly listed ASUS Q504 or Q524 systems who wants a model-specific replacement and values the seller's pre-shipment testing claim. It is less suitable for buyers who need detailed specifications, an established customer rating, or broad cross-model coverage. Exact model confirmation remains the decisive factor.
Specific Compatibility Reduces Guesswork
The listing narrows the field to four named ASUS variants. That focused coverage can make model verification easier, provided the buyer checks the complete system designation and does not assume nearby Q-series models use the same battery.
Pre-Shipment Testing Supports Confidence
The seller states that the product is tested before shipping. This claim can offer added reassurance, but it does not replace checking the connector, physical format, and exact model before installation.
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3. HP EliteBook and ProBook Battery – Dependable Model-Specific Choice
HP EliteBook and ProBook Battery
HP EliteBook and ProBook support
Part number 651948-001
Six-month repair warranty
4.3 customer rating
This replacement CMOS RTC battery targets HP EliteBook 8460p, 8460w, and 8770w systems as well as HP ProBook 6460b models. It carries a 4.3 customer rating and is backed by a six-month PCRepair warranty, combining a clear compatibility statement with meaningful after-sale coverage.
Pros
- Clear target model list
- Useful part number included
- Six-month repair warranty
- Strong customer rating
Cons
- Not intended for every HP notebook
- No detailed electrical specifications
- Installation requires model verification
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The inclusion of part number 651948-001 is particularly helpful because model names can be abbreviated in online listings. A technician or owner can compare that identifier with the original battery or motherboard documentation to confirm the replacement is appropriate. The product is presented as a direct replacement rather than a generic rechargeable cell, making it a practical choice for the specified older HP business notebooks.
This listing is less comprehensive than the first product because it concentrates on a smaller group of systems, but that concentration can be an advantage. Fewer supported models mean less ambiguity when determining whether the battery belongs in a particular chassis. The six-month warranty is another meaningful differentiator, especially compared with listings that provide no stated warranty duration.
The main limitation is the absence of detailed electrical and dimensional information in the supplied description. Buyers should still compare the connector, battery shape, and part number before opening the laptop. Overall, the combination of a 4.3 rating, explicit HP model support, a recognizable part number, and a six-month repair warranty makes this a well-rounded recommendation for the listed systems.
A Clear Compatibility Target
The product name identifies the supported EliteBook and ProBook models directly. This makes it easier to exclude it when a buyer owns an unrelated HP notebook and focus on a genuine replacement rather than a general-purpose substitute.
Warranty Adds Practical Support
A six-month PCRepair warranty provides a defined period for addressing qualifying problems. Buyers should retain the order information and verify the warranty's terms with the seller before installation.
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4. Dell Inspiron and Latitude Battery – Broad Dell Model Support
Dell Inspiron and Latitude Battery
Dell Inspiron model support
Dell Latitude 3470 support
Part number 23.21212.031
Six-month repair warranty
This replacement is aimed at Dell Inspiron 3340, 5368, 5423, 7368, 7569, and 7778 models, as well as the Dell Latitude 3470. It has a 4.0 customer rating and is backed by the same six-month PCRepair warranty mentioned for the HP replacement in this guide.
Pros
- Seven named Dell models
- Compatible part number included
- Six-month repair warranty
- Useful for multiple Dell series
Cons
- No voltage or capacity stated
- No detailed dimensions provided
- Customer rating is moderate
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Its defining compatibility identifier is part number 23.21212.031. That number also appears in the broad Dell-and-HP cable listing, but the products are not necessarily interchangeable in every respect because their physical formats may differ. For this particular battery, the separate model list and the dedicated product title give buyers a clear place to begin verification.
The supported range spans Inspiron and Latitude families, making the option appealing to owners of several of these listed systems. Rather than replacing a main laptop battery, it addresses the smaller RTC battery responsible for retaining BIOS configuration information. This can be useful when the system consistently loses its clock or startup configuration after being disconnected from power.
As with many replacement parts, the listing does not provide detailed electrical specifications or dimensions. Users should inspect the original battery and cable arrangement, compare the part number, and ensure the device is fully powered down before replacing it. The four-point rating is respectable, while the six-month warranty adds confidence. For any of the seven named Dell systems, this is a focused and practical replacement candidate.
Two Dell Product Families Covered
The battery supports seven explicitly named models across Inspiron and Latitude. Buyers should use the full model number and the listed part number together because similarly named Dell systems may use different board components.
Useful for Persistent Clock Issues
A failing CMOS RTC battery can cause a laptop to lose time or startup settings after power is removed. Replacing the correct cell can restore the intended behavior, but the system may also require configuration after installation.
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5. HP ProBook and Stream Battery – Wide HP Consumer and Business Coverage
HP ProBook and Stream Battery
HP ProBook model coverage
HP Stream model coverage
CR2016W rechargeable format
Tested before shipping
This CR2016W replacement covers an extensive assortment of HP ProBook and Stream systems, including ProBook 430, 440, 445, 450, 455, G6, G7, 445R, 455R, and Stream 11 variants. The title also names Zhan 66 Pro 14 and 15 G2 and G3 systems. No customer rating is supplied for this listing.
Pros
- Many ProBook models listed
- Multiple Stream variants listed
- Tested before shipping
- Includes additional laptop names
Cons
- No customer rating listed
- No stated warranty duration
- Very broad and complex model list
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Its strongest feature is the combination of consumer and business notebook coverage. A ProBook owner or a technician servicing several HP Stream models may find that this single listing addresses many otherwise separate battery references. As with the other tested-before-shipping products, the seller advises replacement in the off state and stresses that the laptop model must match the description exactly.
The unusual inclusion of both HP and Zhan branding makes model verification especially important. A shared case name or general product family does not guarantee identical RTC battery construction, connector arrangement, or voltage. Buyers should compare the complete system label, the physical cell, and the lead or connector rather than relying on the product title alone.
No warranty period, voltage rating, capacity, or dimensions appear in the supplied information, which places more responsibility on the buyer to validate those details. Even so, the named ProBook and Stream coverage is substantial. This option is best considered by someone who has already matched the exact model and is seeking a tested replacement with a CR2016W format rather than a generic bare cell.
Useful Coverage for HP Stream Owners
The listing includes several HP Stream 11 and Stream 11 Pro variants. Confirm the exact suffix printed on the underside or base of the system because closely related models can use different batteries.
Tested Status Needs Model Confirmation
Testing before shipment supports quality control, but electrical compatibility still depends on the laptop. Treat the model check as mandatory, especially for the additionally named systems in the listing.
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6. HP ZBook 14 G2 Battery – Focused Mobile Workstation Replacement
HP ZBook 14 G2 Battery
HP ZBook 14 G2 support
HP ZBook 15u G2 support
Part number 665733-001
Six-month repair warranty
This CMOS RTC replacement is specifically listed for the HP ZBook 14 G2 and HP ZBook 15u G2 Mobile Workstation. It carries a 4.1 customer rating, includes compatible part number 665733-001, and is backed by a six-month PCRepair warranty. The narrow focus makes it easier to evaluate than a broad universal listing.
Pros
- Narrow and clear model target
- Compatible part number supplied
- Six-month repair warranty
- Positive customer rating
Cons
- Only two named ZBook systems
- No detailed electrical specifications
- Workstation access may be involved
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Mobile workstations can place greater demands on component durability, which makes a model-specific replacement with an established rating and warranty appealing. The battery is intended to preserve the RTC function that keeps system time and basic BIOS information available while the laptop is disconnected from its main power source. Exact part-number comparison remains the safest way to confirm fit.
The product title does not provide the cell chemistry, voltage, capacity, or dimensions in the supplied information. It also does not explain the connector arrangement, so an owner should inspect the original battery and its leads before ordering. This may require opening the notebook or locating service documentation, and those comfortable with laptop servicing should disconnect power correctly before touching the board.
For an owner of either named ZBook, the inclusion of the specific part number, positive rating, and six-month warranty makes this a strong candidate. It is less useful for other ZBook generations because their batteries and connectors may differ. The final recommendation is therefore straightforward: buy when 665733-001 and the exact model match; otherwise, continue searching.
Purpose-Built for ZBook Models
The product does not try to cover every HP workstation. Its two-system focus lets buyers verify compatibility more efficiently and reduces the risk of choosing a battery based only on a broad family name.
Warranty and Rating Add Reassurance
A 4.1 customer rating and six-month repair warranty provide useful quality signals. They should complement, rather than replace, confirming the original part number and connector.
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7. 40mAh 3.6V Ni-MH Cell – Rechargeable Generic Battery Option
40mAh 3.6V Ni-MH Cell
40mAh rated capacity
3.6 volt rating
Ni-MH rechargeable chemistry
General-purpose cell format
This option is a new 40mAh, 3.6-volt rechargeable Ni-MH battery cell rather than a model-specific laptop replacement. It has a 3.9 customer rating and is identified as an RTC CMOS battery cell. The straightforward electrical information makes it potentially useful for a knowledgeable user who can independently verify the required format.
Pros
- Clear voltage and capacity
- Rechargeable Ni-MH chemistry
- Potentially useful for DIY repairs
- Simple three-specification listing
Cons
- No specific laptop models listed
- No connector details supplied
- No warranty information stated
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The cell's 3.6-volt rating and 40mAh capacity are its most important stated characteristics. Ni-MH chemistry also distinguishes it from many coin-cell-style CMOS batteries. A buyer would need to determine whether the original device uses this voltage and cell geometry, and whether a direct lead, holder, or other connector arrangement is required.
Unlike the dedicated replacements, this listing does not name compatible Dell, HP, ASUS, or Toshiba models. That makes it less convenient for a first-time buyer and more suitable for a repairer with access to the original cell, board documentation, or a known-good equivalent. The generic title also means buyers should not assume the cell will work merely because it is described as an RTC CMOS battery.
No warranty duration, dimensions, or connector details appear in the supplied information. Those omissions matter because a cell can have the stated voltage and capacity yet still fail to fit or connect correctly. This is a practical choice for a DIY user who can measure and match the original component, while less suitable for someone seeking a guaranteed model match. Its 3.6-volt specification and rechargeable chemistry are the main reasons to consider it.
Useful Electrical Details for DIY Matching
The 3.6-volt and 40mAh figures give a DIY buyer concrete benchmarks. Compare them with the failed cell and the device documentation before considering this cell rather than a ready-to-install laptop-specific replacement.
Generic Format Requires More Expertise
The absence of named laptop models means compatibility depends on independent verification. Physical size, voltage, chemistry, and the method of connecting the cell to the motherboard all need attention.
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8. ASUS ZenBook CR1220W Battery – Broad ASUS Family Coverage
ASUS ZenBook CR1220W Battery
Multiple ASUS notebook families
CR1220W rechargeable format
Tested before shipping
Model verification required
This CR1220W replacement spans a wide selection of ASUS notebook families, including T300, TP300L, TP300LA, TP300LD, UX303L, GM501 variants, GU501 variants, GL502V, FX502, FX60V, and GA401. It is tested before shipping, but the supplied information does not include a customer rating or warranty duration.
Pros
- Many ASUS model families listed
- Tested before shipping
- Rechargeable CR1220W format
- Seller assistance available
Cons
- No customer rating listed
- No warranty duration stated
- No detailed dimensions provided
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The wide range of named models is attractive for technicians who encounter several compatible ASUS notebooks. It also gives an individual buyer several identifiers to compare with the chassis label. Nevertheless, the seller's repeated instruction to verify the exact model and part number is important because the list includes many product families and closely related suffixes.
Because it is a rechargeable CR1220W format, this may differ from the primary coin-cell battery used in some laptops. The seller describes it as suitable for replacing a faulty, cracked, or broken RTC battery and recommends doing so while the laptop is off. Before installation, compare the existing cell, the lead, and the motherboard connector to avoid mechanical or electrical mismatch.
This product is a good candidate for an owner of one of the explicitly listed ASUS systems who has confirmed the physical format. The testing claim provides some reassurance, but buyers should request missing dimensions or electrical information from the seller if their model requires that level of verification. It is less appealing for buyers who want a customer rating, an explicit warranty, or a simplified one-model purchase.
One Listing for Many ASUS Families
The broad family coverage can simplify maintenance for a technician or support many different consumer notebooks. Exact suffix matching remains necessary because related ASUS models can have different motherboard layouts.
Rechargeable Format Calls for Inspection
A CR1220W rechargeable battery is a specific component rather than a universal coin cell. Confirm the cell shape, lead, connector, and electrical requirements against the original assembly before ordering.
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9. 40mAh 4.8V Ni-MH Cell – Dimensioned Rechargeable Component
40mAh 4.8V Ni-MH Cell
40mAh rated capacity
4.8 volt rating
Ni-MH rechargeable chemistry
11.8 by 22 millimeter size
This generic Ni-MH RTC CMOS cell is specified at 4.8 volts and 40mAh, with a diameter of 11.8 millimeters and a height of 22 millimeters. Those measurements are useful because a buyer can compare them directly with the removed cell. Its 1.0 customer rating is the lowest among the products in the guide, warranting careful consideration.
Pros
- Voltage clearly stated
- Physical dimensions provided
- Rechargeable Ni-MH chemistry
- Capacity clearly stated
Cons
- Lowest customer rating
- No laptop models named
- No connector information supplied
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Unlike the 3.6-volt generic cell, this option provides a specific physical size. That makes the listing more useful for a repairer searching for a component with a particular envelope. Still, no compatible laptop models, connector style, or lead arrangement are stated, and the low rating gives less evidence of broad customer satisfaction.
A 4.8-volt Ni-MH cell may consist of multiple internal elements, but the listing does not explain its construction. A buyer should not assume it is electrically interchangeable with a 3.6-volt cell merely because both use Ni-MH chemistry. The original battery marking, service documentation, and measured cell dimensions should guide the decision.
The lack of a model list and connector information means this product is best for technically confident users who can identify the original component and adapt or match the connection correctly. It is not the easiest choice for a typical laptop owner, and the 1.0 rating reinforces the need to verify specifications carefully. Its main advantage is the unusually specific combination of voltage, capacity, and physical dimensions.
Dimensions Support Fit Verification
The stated 11.8-millimeter diameter and 22-millimeter height let a buyer check the available space. Use calipers or carefully compare the original cell, and do not rely on image scale alone.
Low Rating Calls for Caution
A 1.0 customer rating provides a clear warning to investigate the product and seller information before purchase. Exact electrical and physical matching is essential because the listing does not name supported laptop systems.
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10. Toshiba Satellite CMOS Battery – Most Detailed Warranty Coverage
Toshiba Satellite CMOS Battery
Extensive Toshiba Satellite support
2.4 volt and 20mAh ratings
Ni-MH rechargeable chemistry
Two-hundred-day warranty
The HQRP replacement provides the strongest customer rating in the guide at 5.0 and one of its most clearly documented specifications: a 2.4-volt, 20mAh Ni-MH battery with a 200-day warranty. It is compatible with an extensive list of Toshiba Satellite systems, spanning 300CDT, 300CDS, 305CDS, 310CDS, 310CDT, 315CDS, 315CDT, and 320CDS through several 3300, 4000, and 2700-series families.
Pros
- Highest customer rating
- Extensive detailed model list
- Clear voltage and capacity
- Two-hundred-day warranty
Cons
- Focuses on Toshiba Satellite systems
- Older model focus
- Part numbers may need confirmation
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The model list continues with 320CDT, 325CDS, 330CDS, 330CDT, 335CDS, 335CDT, 4000, 4010, 4020, S504, S703, S704, S705, 4000CDS, 4000CDT, 4005CDS, 4005CDT, 4010CDS, 4010CDT, 4015CDS, 4015CDT, 4020CDT, 2670DVD, 2675DVD, 2710XDVD, 2710, 2750, 2770, 2715XDVD, 2750DVD, 2755DVD, 2770XDVD, 2775XDVD, and 300CDS. The listing also supplies several PS280U8G5L-series part numbers.
The combination of a five-point customer rating, a long stated warranty, and unusually detailed electrical information makes this the strongest documentation-focused option. It gives a buyer more concrete information than a listing that only provides a long model list. The 200-day warranty also exceeds the six-month repair warranty associated with several model-specific alternatives in the guide.
Its primary limitation is brand and generation focus. It is intended for named Toshiba Satellite systems rather than universal laptop use, and the oldest listed platforms may have different connector or physical arrangements despite appearing under the same family. Buyers should confirm the complete model and any available part number before installation. For a compatible Toshiba Satellite owner, this is the most compelling premium pick based on rating, specification detail, and warranty duration.
Detailed Specifications Reduce Uncertainty
Stating the 2.4-volt rating, 20mAh capacity, and Ni-MH chemistry gives buyers useful benchmarks. These details can be compared with the original cell and service documentation before installation.
Long Warranty for Older Notebooks
A 200-day warranty is a notable benefit when maintaining an older Toshiba Satellite. It provides more stated coverage than the alternatives, though buyers should still confirm the exact model and connection method.
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Buying Guide – How to Choose the Best Replacement Motherboard Cmos Battery
A CMOS RTC battery may look minor, but choosing the wrong voltage, size, chemistry, or connector can prevent a successful repair. Use the following factors to narrow the search, confirm compatibility, and decide whether a dedicated replacement or a generic rechargeable cell is the better choice.
Confirm the Exact Laptop Model
Start with the complete model number printed on the laptop's underside, service label, or system-information screen. A family name such as Inspiron, ProBook, Latitude, ZBook, or Satellite is not enough on its own because related models can use different RTC battery formats, connectors, and board layouts. Compare the complete designation with the seller's compatibility list rather than matching only the first few characters.
Check the Original Part Number
An OEM or board part number is often the most reliable identifier. The guide's products reference 23.21212.031, 651948-001, 691572-001, and 665733-001 among others. Read the marking on the removed cell, inspect any molded connector label, and compare the number with the listing. Similar-looking cells may share a voltage while still differing in size, lead placement, or attachment method.
Match Voltage and Chemistry
The available choices show why electrical matching matters. Listed products include 2.4-volt, 3.6-volt, 3.8-volt, 4.8-volt, and CR-series rechargeable formats, while some listings do not disclose voltage. Ni-MH chemistry also appears across several options. Do not assume that all CMOS batteries are interchangeable: use the original battery marking, service manual, or seller-confirmed specifications to match the required electrical configuration.
Verify Size and Connector
The generic 40mAh cell provides explicit dimensions of 11.8 millimeters in diameter and 22 millimeters in height, but other listings do not include measurements. Measure the original cell and account for the battery holder, adhesive, cable routing, and board connector. A direct replacement should match the intended placement without forcing the cell, connector, or leads.
Choose Direct or Generic
A model-specific replacement is usually easier for an ordinary owner because the listing already narrows compatible systems and may include installation guidance. A generic rechargeable cell can be useful to a repairer who can measure the original part and identify the correct electrical arrangement. Generic listings demand more independent verification and may require adapting the connection, so they are less convenient for first-time laptop repairs.
Review Warranty and Support
Warranty terms vary considerably in the guide. The Toshiba HQRP option states a 200-day warranty, while three PCRepair products state six-month coverage. Some other listings make no warranty claim. A defined warranty can be valuable, but the buyer should still review its exclusions, return conditions, and proof-of-purchase requirements. Testing before shipping is useful supporting information, though it is not a substitute for compatibility verification.
Use Ratings as Supporting Evidence
Customer ratings can help identify products with stronger reported satisfaction, but the number of reviews and the nature of each experience are not provided here. The Toshiba option has a 5.0 rating, while the Dell-and-HP cable and HP EliteBook replacement have 4.5 and 4.3 respectively. Treat ratings as one signal, especially for a listing with a low score or no rating, and prioritize exact fit and accurate specifications.
Plan for Safe Installation
Replacing a CMOS battery normally involves opening the laptop and disconnecting power from the board. Work with the device fully shut down, disconnect the main battery when appropriate, and consult service documentation for the exact procedure. Static electricity, battery damage, and connector stress can create new problems, so a technician or careful owner should review the model-specific procedure before touching the motherboard.
How to Use and Care for Your Replacement Motherboard Cmos Battery
Before installation, identify the laptop's complete model and compare it with the replacement's stated compatibility information. Read any marking on the old battery, verify the part number, and inspect the connector and cable path. Do not proceed if the listing offers a similar model rather than an exact match, and obtain missing dimensions or electrical details from the seller when necessary.
Power the laptop down fully, unplug it, and follow the manufacturer's service procedure for removing the main battery and accessing the motherboard. Remove the old RTC battery without levering against nearby components or stretching its connector. Seat the new battery in the same orientation and route its leads so they do not interfere with covers, fans, shields, or other moving parts.
After installation, reconnect power and boot the system. Some laptops may require the operating system to recognize a new battery, while others may show clock errors or prompts until the RTC is recharged. Check the time, BIOS settings, and any battery-related messages. If problems continue, shut down and verify the connector and model match rather than repeatedly reconnecting a possibly incompatible battery.
Frequently Asked Questions
What does a replacement motherboard CMOS battery do?
A CMOS or RTC battery supplies power to the motherboard's real-time clock and configuration memory when the laptop is switched off or disconnected from its main battery. It commonly keeps the system time, boot settings, and other BIOS information from being erased. Replacing it can resolve a laptop that repeatedly loses its clock or startup configuration after being turned off.
How do I identify the correct CMOS battery for my laptop?
Begin with the complete laptop model number and then inspect the original CMOS battery for a printed part number. Compare both identifiers with the replacement listing, and verify the cell size, voltage, chemistry, connector, and lead arrangement. Similar model names are not enough to guarantee compatibility, especially when one listing covers several product families.
Are CR1220W and CR2016W CMOS batteries interchangeable?
They should not be treated as automatically interchangeable merely because both use the same rechargeable naming format. Their physical size, electrical construction, voltage, and connector can differ. A CR1220W replacement for an ASUS Q504 or Q524 should be matched to those systems, while the CR2016W option is intended for the listed HP ProBook, Stream, and related systems.
Can I install a generic Ni-MH RTC battery cell?
A generic cell can work when its voltage, capacity, dimensions, chemistry, and connection method precisely match the original component. The 3.6-volt and 4.8-volt 40mAh cells in the guide do not name compatible laptop models, so they are better suited to experienced repairers who can verify the original specification. A model-specific replacement is generally easier for a first-time owner.
Will replacing the CMOS battery erase BIOS settings?
Removing a dead CMOS battery can result in the loss of clock and configuration data because that data may no longer have reliable power. This behavior varies by laptop, and some systems retain settings in other storage or restore defaults automatically. Record important boot-device, security, and administrator settings before opening the case when possible.
Do I need to recharge a replacement CMOS battery?
That depends on the chemistry and the laptop's charging design. The guide includes rechargeable Ni-MH cells and CR-series formats, but their behavior may differ from a non-rechargeable coin cell. The system may charge the replacement while operating, or the battery may need to be conditioned according to its instructions. Follow the seller's and laptop manufacturer's guidance.
Why does the system still show the wrong time after replacement?
The replacement may not yet have established a charge, the laptop may still be using incorrect time settings, or the operating system may be set to automatic time synchronization. It is also possible that the battery is not actually compatible or is not seated correctly. Verify the model, connection, and RTC behavior before assuming the new cell is defective.
What should I do if the battery is swollen or leaking?
Stop using the battery and avoid pressing, puncturing, crushing, or shorting it. Do not continue opening the laptop if leakage is present, because electrolyte can damage the board and other components. Handle the device carefully, keep it away from heat and metal objects, and seek appropriate repair or recycling guidance for the damaged battery and laptop.
Final Thoughts on Choosing the Best Replacement Motherboard Cmos Battery
The strongest overall choice depends on the laptop in front of you. The Dell-and-HP cable offers the broadest listed model and part-number coverage, the HP EliteBook and ProBook replacement pairs a 4.3 rating with six-month warranty coverage, and the Toshiba HQRP battery leads the guide with a 5.0 rating, detailed electrical specifications, and a 200-day warranty.
For the remaining products, focus on the reasons each was included. The ASUS Q504 and broader ASUS listings serve specific families, the Dell Inspiron and Latitude option includes a recognized part number, the HP ZBook product is tightly targeted, and the generic Ni-MH cells are most appropriate for technically experienced users who can match voltage, dimensions, and connectors. Exact model confirmation should come before any feature comparison.
Finally, review the current product page, availability, seller details, warranty terms, and price before ordering. Compatibility information and marketplace conditions can change, and a current listing may contain details not shown in the supplied product information. The safest purchase is the one whose complete model, part number, physical construction, and electrical requirements all match the laptop's original battery.