This brand new BT04XL Extended Life Battery features latest technology on all components and parts. Please see the detail features below. BT04XL laptop Battery Uses the highest quality graded and sorted 'A' Grade cells . Has resistance welded gold plated contacts for maximum performance. Provides excellent discharge characteristics. Uses high impact ABS and Polycarbonate plastic housings for ruggedness. Undergone comprehensive testing including high altitude performance, vibration, mechanical shock, thermal cycling, external short circuit and overcharge test simulations. Includes a 24-months free Genuine warranty for manufacturer's defects. How to Select BT04XL Battery Type: Lithium-ion and Lithium-polymer are standard material for laptop batteries. They have a good power-to-weight ratio and has no memory effect like some other battery materials. Voltage: The Voltage must be within 10% of your original Laptop Battery Voltage. i.e. 11.1V is ok for your original 10.8V Battery; 14.4V is ok for your original 14.8V Battery Capacity: Laptop batteries will typically list their capacities in milliamp hours (mAh) or Wattage (Wh). A higher mAh or Wh rating means the battery will take longer to drain, giving your laptop a longer runtime per charge. Cell: Extended batteries (i.e. 9 cell or 12 cell) are usually has extra run time of laptop in between charges, usually bigger in size and weigh more than a standard laptop battery (i.e. 6 cell).
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