EEMB

EEMB 10-Pack CMOS Battery CR2032 3V Lithium Battery

Name: EEMB 10-Pack CMOS Battery CR2032 3V Lithium Battery with 2 Pin 2 Wire Cable and MOLEX Connector CMOS Replacement for Alienware M11 Dell E6520
Brand: EEMB
SKU: B09F38WVWH

Bottom line: The EEMB 10-Pack CMOS Battery CR2032 3V Lithium Battery: 10 pre-wired CR2032 cells cover a fleet of Dell, Alienware and ThinkPad laptops; main trade-off: connector polarity is not universal; a mismatch can short your board.

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By Mike Perry, Founder & Editor-in-Chief · Listing data updated 2026-10-06

Mike Perry — Hardware researcher since 2014. For PC and retro-hardware cleaning and maintenance tools, synthesises manufacturer documentation, community compatibility lists and marketplace listings rather than first-hand lab testing. Core beat: GPU performance across gaming, rendering, and local-LLM inference. About the author →

Pros & Cons

Pros

✓ 10 pre-wired CR2032 cells cover a fleet of Dell, Alienware and ThinkPad laptops
✓ Plug-in 2-pin Molex lead (CR2032-MX51021), no soldering needed
✓ Under 3% self-discharge per year at room temperature, per EEMB
✓ TUV-tested to IEC 62133; EEMB lists UL certification file MH20555

Cons

✗ Connector polarity is not universal; a mismatch can short your board
✗ Non-rechargeable; EEMB warns never to charge these cells
✗ EEMB advises using cells within 2-3 months of purchase for best results
✗ Fit list skews to older Dell, Alienware and Lenovo models; verify yours

Manufacturer description

Bring a dead BIOS clock back to life with the EEMB 10-Pack CMOS Battery. Each CR2032 3V lithium coin cell comes pre-wired with a 2-pin, 2-wire lead and a Molex connector (model CR2032-MX51021). That means no soldering: you unplug the old cell and plug in the new one. Each cell is rated at 240mAh and measures 20.5mm in diameter and 6.5mm tall. EEMB lists fitment for Alienware M11x R1/R2, M14x, M17x and M18x R2. It also lists Dell Latitude E6520, E6420, E6320, E5530 and E6430, plus Lenovo ThinkPad T40, T410, T420 and T420s motherboards. With ten cells in the box, you can service a whole shelf…

SpecPicks Verdict

SpecPicks scored EEMB 10-Pack CMOS Battery CR2032 3V Lithium Battery using a rating × review-volume × price-fit model applied to published specs and reviews across the tools & maintenance category. EEMB's tools & maintenance lineup sits within the broader category mid-tier; price and specs are the deciding factors over brand loyalty here. Judge it on the specification table and the price rather than on sentiment: check the figures that decide your use case, then put it side-by-side with two or three close alternatives in the Compare tool before clicking through.

Common buyer scenarios for tools & maintenance: PC towers accumulate significant dust in 3–6 months, so cleaning frequency drives cordless vs. canned-air tradeoff decisions. Match the device's RPM or CFM rating to your case size, and confirm battery runtime covers a full tower cleaning before ordering. Prices and stock are set by the retailer and may have moved since this page was last updated.

Frequently Asked Questions

Will this CMOS battery fit my Dell Latitude E6420 or E6520?

Yes. EEMB lists Dell Latitude E6520, E6420, E6320, E5530, E5430, E6230, E6530 and E6430 as compatible. Still, confirm that the connector size and polarity match your board before you install it.

Does it work with Lenovo ThinkPad T410 and T420?

EEMB lists the ThinkPad T40, T400, T41, T410, T410i, T42, T420, T420i and T420s. The cell connects with a 2-pin Molex plug (CR2032-MX51021), so no soldering is required.

What are the battery specs?

Each cell is a 3V CR2032 lithium coin cell rated at 240mAh, 20.5mm in diameter and 6.5mm tall. The operating range is -20C to +60C, and self-discharge is under 3% per year at room temperature.

Can I recharge these batteries?

No. They are primary lithium cells, and EEMB explicitly warns not to charge them. Replace each cell when it is depleted.

Is the battery safety certified?

The cells are safety-tested by TUV to IEC 62133. EEMB says more than 400 of its battery models are UL certified. You can look up their certifications on UL's site under file MH20555.

Key Features

BASIC INFO—Voltage: 3V; Capacity: 240mAh; Diameter: 20.5mm, Height: 6.5mm. Connector: CR2032-MX51021. Attention: Do not charge! Make Sure Device Polarity Matches with Battery Pack Connector Before Purchase!!!-1.Battery Size; 2.Connector Model; 3.Connector Size; 4.Connector Polarity - THIS IS NOT UNIVERSAL!!! (It will cause a shortage if the polarity of the battery connector does not match your device.)
CERTIFICATIONS—Safety test by TUV: IEC 62133. More than 400 EEMB battery models are UL certified. Search "MH20555" on UL for all EEMB UL certification information.
POWER LONGEVITY & ENERGY-SAVING—EEMB coin batteries are safe, free of mercury, high pressure and high energy density. Operating temperature range: -20℃ to + 60℃. Durable for long lasting performance. Less than 3% per year at room temperature. Long effective period. Superior high-speed pulse discharge characteristics. Continuous discharge stability. Will not leak in equipment during use and for two years after placed in equipment.
STORAGE—No leak, excellent cost performance and long cycle life. we highly recommend customers use the battery within approximately 2-3 months, depending on the storage condition to receive optimal performance. Please keep out of reach of children. Do NOT SWALLOW.
APPLICATION—Suitable for Alienware M11x R1 R2 Area-51 13 15 17 18 R2 R3 R4 M14x R1 R2 M17x M18x R2 Area-51 M9700 M9750Dell Latitude E6520, E6420, E6320, XFR E6420, ATG E6420, E5530, E6230, E5430, E6530, E6430;IBM Lenovo Thinkpad T40 T400 T41 T410 T410I T42 T420 T420I T420S.

Full Specifications

Brand	EEMB
Voltage	3 Volts
Amperage	1.5 Amps
Model Name	CR2032
Unit Count	10.0 Count
Reusability	Single Use
Model Number	CR2032
Battery Weight	3.5 Grams
Item Dimensions	0.13 x 0.79 x 0.79 inches
Antenna Location	Indoor/Outdoor
Battery Capacity	240 Milliamp Hours
Battery Cell Type	Lithium Manganese Dioxide
Number of Batteries	10 Lithium Metal batteries required. (included)
Battery Cell Composition	Lithium Manganese Dioxide
Recommended Uses For Product	Indoor/Outdoor
Full listing title	EEMB 10-Pack CMOS Battery CR2032 3V Lithium Battery with 2 Pin 2 Wire Cable and MOLEX Connector CMOS Replacement for Alienware M11 Dell E6520 Thinkpad T40 Motherboards

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EEMB 10-Pack CMOS Battery CR2032 3V Lithium Battery with 2 Pin 2 Wire Cable and MOLEX Connector CMOS Replacement for Alienware M11 Dell E6520 Thinkpad T40 Motherboards is vintage hardware; the used and vintage market on eBay carries most of the live inventory. Prices and condition vary by seller and move in real time, so we link the live listing rather than quote a cached price. It also has an Amazon listing — check it for current price and availability. SpecPicks earns a small commission on qualifying purchases — thank you for supporting independent review work.

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