Masione 18V 4.0Ah Li-ion Replacement Extended Capacity Battery for Hitachi BSL1830 DS18DSAL BSL1815X Cordless Tools Brand New | Li-ion | 18 Volts | 4000 mAh | Black Batteries are made with the highest quality materials 100% Compatible with HITACHI BSL1830 Integrated microchip prevents overcharging & lengthens battery life 30 Days Money Back and 1 Year Warranty