This is a generic, equivalent one, 100% compatible. This 2 pin connector replacement CMOS battery is designed to compatible with IBM Thinkpad A20 A20P A20M A21 A21E A21M A21P.

Specifications:
* Product Type: generic/equivalent
* Battery Voltage: 3V
* Length: 6.5 cm
* 2 Wires - 2 Pin Connector
* Condition: new, 1 Year Warranty!
* The real time clock battery CMOS BIOS backup battery with two wires two pin connector
* Will fix the following error codes: Systems battery error / System CMOS checksum bad / System Timer error / Real-Time Clock Error

Compatible Model
For IBM Thinkpad A20, A20P, A20M, A21, A21E, A21M, A21P, A22, A22M, A22P, A23, A30, A30P, A31P
P/N: 92P0986/ 08K8216 /08K8050 / 02K6541

Package Included:
1 x Replacement BIOS CMOS Battery for IBM Thinkpad A20 A20P A20M A21 A21E A21M A21P