Lenovo ThinkPad Battery 55++ (Dual Mode), 57Y4186

The ThinkPad Battery 55++ (9 Cell) (57Y4186) features:

Lithium-Ion (Li-Ion) technology
Nine-cell, rechargeable system battery, 94Wh
Standard system battery specifications
Over-discharge protection
Compatible with the ThinkPad External Battery Charger (40Y7625)

ThinkPad Battery 55++ (9 Cell) (57Y4186):

Approximate height: 21 mm (0.8 in)
Approximate width: 218 mm (8.6 in)
Approximate depth: 79 mm (3.1 in)
Weight: 0.50 kg (1.10 lb)

ThinkPad Battery 55++ (9 Cell) (57Y4186) packaged in a carton:

Approximate height: 48 mm (1.9 in)
Approximate width: 295 mm (11.6 in)
Approximate depth: 132 mm (5.2 in)
Weight: 0.63 kg (1.38 lb)

Compatible with the following ThinkPad models:
ThinkPad L410, L412, L420, L421, L510, L512, L520
ThinkPad T410, T410i, T420, T510, T510i, T520
ThinkPad W510, W520