Lenovo Retail Part Number 0A36302, Thinkpad Battery 70+ , 6 Cell Original Factory Packaging For Select Lenovo 0A36302 Is A 6 Cell Primary System Battery 70+, 57wh , 5.2ah, 10.8v, 340 Gram Weight. Lenovo 0A36302 70+ Is Compatible With Thinkpad Models ;T410 ( not the T410s), T410i , T420 ( not the T420S), T420i, T430( not the T430S), T430i, T510 (Not the T510S) , T520( Not the T520S) , T530, W510, W520 , W530, L412 , L420, L430, L510, L512, L520, L530. Warning As This Item Is Not Used In These Models T410S, T410SI , T420S, T420SI , T430S, T430SI , W500 , X Series, P Series, G Series or T440, T450, T460 Series, Lenovo model #'s are suffix specific. Lenovo OEM product in the Security Sealed Lenovo Retail Packaging to ensure receiving a genuine Lenovo battery 70+.