The EGO Power + 4.0 Ah 56 volt lithium ion battery fits all the EGO Power Plus cordless gardening tools and has a built in fuel gauge to show how much charge it has left to run. The EGO \'Keep Cool\' technology keeps each battery cell cool which extends the overall life of the battery.These EGO Power Plus batteries provide up to 40% more power than a leading 40v battery.Features:80 minutes charge time with the standard EGO Power + charger & 30 minutes with the EGO Power + Infinity fast chargerWarranty : Manufacturer\'s 3 year