Worx WA3520 20-Volt 1.5 Amp Hour MaxLithium Battery &ndash; PowerShare Battery Platform and Replacement Battery 1..5 Ah battery charges quickly and runs any WORX 20V tool. Charging Time: 5 Hours Share batteries and save money, with the WORX 20V PowerShare Platform For extended run time, see our 2.0 Ah 20V MaxLithium Battery (WA3525) MaxLithium technology means more efficiency and no memory effect Can be charged by WORX WA3732, WA3731, WA3742, or WA3847 (Quick Charger) Interchangeable with part number 50023390