A replacement laptop CMOS battery designed to keep BIOS settings and the real-time clock running when mains power is disconnected. Owners of older Alienware, Dell and ThinkPad models will appreciate the straightforward fit and pre-attached Molex connector, EEMB CR2032 CMOS Battery. Does the connector and polarity match your machine?
⚡ At a Glance
- • Voltage & Capacity: 3V voltage, 240mAh capacity, CR2032 form factor (diameter 20.5mm, height 4.3mm)
- • Best for: Maintaining BIOS clock and CMOS settings on compatible Alienware, Dell and ThinkPad laptops
- • Not ideal for: Devices that require a rechargeable cell or users unable to confirm connector polarity
Pre-wired CR2032 coin cell with a Molex 1.25mm two-pin connector for listed laptop models. TUV safety tested to IEC 62133 and many EEMB models carry UL certification.
Reliable CMOS back-up - Thanks to 3V, 240mAh CR2032 cell
Coin cell stores a nominal 3V with 240mAh capacity in the standard CR2032 form factor, preserving real-time clock and BIOS memory when main power is removed. Dimensions are 20.5mm diameter and 4.3mm height to match CR2032 sockets.
Keeps date, time and BIOS settings intact during battery swaps or long offline periods. Practical for restoring lost CMOS memory in older laptops.
Easy fit for supported laptops - With CR2032-MX51021 Molex 1.25mm connector
Two-pin wire leads terminate in a Molex 1.25mm connector identified as CR2032-MX51021, designed to mate with the battery ports used on the listed Alienware, Dell and ThinkPad models. Connector polarity must be confirmed prior to installation to avoid short circuits.
Simple swap-in replacement when connector and polarity match, avoiding soldering or adapter work. Ideal for technicians and end users comfortable checking connector orientation.
Safety-minded manufacture - With TUV testing and UL-listed model range
EEMB reports safety testing by TUV to IEC 62133 and notes more than 400 EEMB battery models are UL certified; search 'MH20555' on the UL database for further manufacturer certification information.
Provides reassurance on build and safety standards during replacement tasks. Helpful where authorised or certified components are preferred for repair work.
✨ The 4 Key Reasons for EEMB CR2032 CMOS Battery
- Pre-attached Molex connector - Reduces installation fuss, avoids soldering for plug-in replacements
- Wide laptop compatibility - Fits many Alienware, Dell and ThinkPad models listed by manufacturer
- TUV safety tested - Meets IEC 62133 safety standard for consumer battery use
- Clear installation warning - Polarity confirmation prevents short circuits and incorrect installs
📋 Technical Details at a Glance
- Category: CMOS/Laptop backup battery
- Voltage: 3V
- Capacity: 240mAh
- Cell type: CR2032 coin cell
- Dimensions: Diameter 20.5mm; Height 4.3mm
❓ Frequently Asked Questions
Q: Is this battery rechargeable?
A: No. Do not charge the cell; the product is a non-rechargeable CR2032 coin cell designed for CMOS backup.
Q: Which laptop models are compatible?
A: Compatibility is listed for many Alienware, Dell Latitude and IBM/Lenovo ThinkPad models; check the detailed compatibility list above before purchase.
Q: Is the battery safety tested?
A: Yes. EEMB reports TUV safety testing to IEC 62133 and notes that many EEMB models are UL certified (search MH20555 on the UL site).
🏆 Our Verdict
Suitable for technicians and owners of older Alienware, Dell and ThinkPad laptops who can verify connector type and polarity. Pre-wired Molex leads and recognised safety testing make for a straightforward, safety-conscious swap on compatible machines. Long-term value depends on an exact fit, but certified construction and ready-to-fit leads support reliable service life.
