Powerextra High Capacity Hitachi 18V 4000mAh Li-ion Drill Battery for BSL1830 DS18DSAL BSL1815X Cordless Tools Battery for hitachi 18v power tool battery Battery Type:Li-ion / Voltage:18V / Capacity:4000mAh Charging at any time will have no effect on the battery Powerextra products are CE certified, tested by manufacturer to match OEM products 1 pair of gloves contained to prevent your hands from dirty