eBay

Attention! Please carefully check the last photo as these stated laptop models contain 2 pin batteries which can have two differently shaped/ sized connectors; don't be misled by the part number - Even if your model matches one given on the title you need to be certain that the connector is identical to this or it may not fit due to revisions of the same models

Compatible Model: Lenovo ThinkPad T400, T400S, T410, T410S, T420, T420S, T430, T430S, X1, X30, X31, X32, X200, X220, X220, X220T, X201I, T410, T420, W510, L430, W700, X230, X301, R60, S230U, X220I, X230U, X240, X240I, W701, W701DS, T500, T510, T520, R400, R500 W500 W510 W520 W530, A20, A20P, A20M, A21

Technical details:

Socket type: 2pin version
Cable length: 5cm
Nominal voltage: 3V
Nominal capacity: 220mAh
Recommended continuous drain: 0.2mA
Recommended pulse drain: 16mA
Diameter: 20.0mm
Height: 3.20mm
Weight: 3.0g
Low self-discharge rate and stable discharge voltage
Wide working temperature range: -20 to 60C

Will fix the following error codes:
0250: systems battery error
0251: System CMOS checksum bad
0260: System Timer error
0270: Real-Time Clock Error

Please check all the specs and ensure this battery meets your devices' needs

It may be suitable for many other models

Please also note that these models sometimes also require the longer and thinner connector which can found from the following eBay item number which you can enter into the eBay search box - 323303927702

Please note that in my recent batches of batteries that I order directly from the factory that manufacture them I have requested no printing or writing on the outer plastic shrink wrap since they sometimes came with specific part numbers relating to specific laptop models and I wanted to remove that confusion for customers The photo is for illustration purposes only

ref BM382