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

Edge E220S E420S E430 E431 E440 E540 E545

E450 E455 E555 E460 E465 E560 E565 E470 E475 E570 E575 E480 E485 E580 E585 E490 E490S E495 E590 E595

L412 L512 L420 L520 L440 L540 L450 L460 L560 L470 L570 L380 L480 L580 Yoga L390

T410S T430U T431S T440 T440S T450 T450S T460 T460S T460P T470 T470S T470P 25 T480 T480S T490 T490S T495 T495S T550 T560 T570 T580 T590

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

ref BM9