Key Feature: Type: 6-cell Lithium-ion (Li-ion) Capacity: 47Wh (Watt-hour) Voltage: 11.1V (Nominal), 12.6V (Max) Amp-Hour: 4.2Ah Dimensions: 294mm x 78mm x 22mm (11.57″ x 3.07″ x 0.87″) Weight: 0.35kg (0.77 lbs) Battery Life: 4-8 hours (depending on usage) Charging Time: 2-4 hours with standard HP charger Operating Temperature: 0°C to 50°C (32°F to 122°F) Storage Temperature: -20°C to 60°C (-4°F to 140°F) Compatibility: HP EliteBook 810 G1, HP ProBook 450 G1, and similar HP laptops Connector: 6-pin or 7-pin connector (varies by model)