02K7078 08K8050 CMOS Battery for IBM Lenovo X30 P50 Compatible with the following computers IBM Lenovo ThinkPad : X30 X31 X32 X220 T440s L540 T400 T440p L440 T450S T410 T420 T420s T430 T430s T410i T550 T570 L540 L560 L570 S540 S531 P51s Yoga 15 W500 W510 W700 P50 R60 IBM Thinkpad 570 Series- 570, 570E, 570X, 570Z IBM ThinkPad A Series- A20, A20P, A20M, A21, A21E, A21M, A21P, A22, A22M, A22P, A23, A30, A30P, A31P IBM ThinkPad T Series- T20, T21, T22, T23, T30, T40, T41, T42, T43, T60 IBM ThinkPad R Series- R40, R40e, R50, R50e, R50p, R51, R52, R60, R60e IBM xSeries- 300, 400 Compatible with Part Number IBM Lenovo 02K7078 ASM P/N: 0A90099 FRU P/N 04W1642 08K8050 BATTERY RTC,1C CR2032/S7FN Replace IBM P/N 02K6541, 02K7075, 08K8050 FRU # 02K6572, 92P0991, 92P0986 Substitute for 01AW187, 01AW186, 92P0986, 04Y1784, 04Y1785, 02K6572, 01LW332, 04W1642, 04W0010, 04W4240Coin cell battery with two wires two pin connector. Fixes Real-Time Clock Error : 0270