Stay unplugged longer with ThinkPad Battery 80+ (6 cell). This rechargeable battery use Lithium-Ion (Li-Ion) technology and can be used as a replacement for aging system batteries or as a convenient spare battery. The ThinkPad Battery 80+ (6 cell) (0A36278) features: Lithium-Ion technology Six-cell, rechargeable system battery, 57 Wh Standard system battery specifications Over-discharge protection Output voltage: 10.8 V dc (nominal) Battery Performance Amp-Hour: 5.2Ah Battery Performance Watt-Hour: 57Wh Compatible with ThinkPad External Battery Charger

Physical specifications
Approximate height: 23.64 mm (0.931 in) Approximate width: 214.0 mm (8.425 in) Approximate depth: 54.3 mm (2.138 in) Weight: 345 g (0.761 lb)

Operating environment
Temperature: 5 deg to 35 deg C (41 deg to 95 deg F) Relative humidity: 8% to 95% Shock: 50cm free drop Vibration (Random RMS): 1.04 G (2 Hz to 200 Hz)