Kobalt 40v Max Li-Ion 2.0 Ah Quick Charge Battery High performance Kobalt 40-volt Li-ion battery delivers fade-free power with no memory loss after charging Compatible with the Kobalt 40-volt max team - 1 battery system for 7 lawn care tools Quick charge time - 60 minutes Fuel gauge provides an easy check on available power level Initial no-load voltage, when fully charged, peaks at 40 volts; nominal voltage under typical load is 36 volts