Worx WA3537 32V 2.0 Ah Replacement Battery 32-volt MAX lithium battery technology means long life, no self-discharge, lightweight and no memory effect Battery can be charged at any time and will remain charged without losing power until ready for use Weighs a little more than a pound Use this battery with WORX series WG175, WG175.1, WG575, WG575.1, WG924, WG924.4 Compatible charger: WA3740 Interchangeable with part number 50025228