Description 【Replace Battery for Worx】Battery type: Li-Ion | voltage: 20V | capacity: 5000 mAh | Replacement for Worx Battery | Compatible for Worx 20V Chargers 【Widely Compatibility】Compatible for Worx 20V Battery WA3551.1, WA3572, WA3553, WX390, WX176, WX178, WU268, WX166.4, WX372.1, WX800, WX802, WX678, WX550, WX523, WU531.9, WG894E, WG629E, WG329E, WG259E, WG169E, WG026.9, WG894E.9, WG546E.9, WG546E.9, WG546E 【Longer Runtime】20Volt 5.0Ah Lithium battery provides extended runtime for your Worx tools, make your cordless power tools work like new again. LED indicator design for easy checking of battery level. 【Multiple Protection】Intelligent technology with built in impact protection monitors and balances individual cells, against over charge, over discharge, over current and over heating, provides short circuit protection and steady voltage circuit 【Professional Service】Including 2 batteries. Made with the high quality Li-ion cells.