Snow Joe + Sun Joe iBAT40-LTE iON EcoSharp PRO 40 V 2.0 Ah Lithium-Ion Battery 40 V lithium-ion technology - High capacity cells with no-fade power for maximum job performance No memory effect - Charge whenever you want without having to drain the battery or wait for full charge before use Cord-free operation - No gas, oil, tune-ups, pull-cords, or tangled extension cords! For use with all Snow Joe and Sun Joe cordless iON models ETL approved; 90 day warranty; Energy Star certified