Kobalt 80-Volt Lithium Ion (Li-ion) Cordless Power Equipment Battery High performance Kobalt 80 Volt lithium-ion battery delivers fade-free power with no memory loss after charging Compatible with the entire Kobalt 80 Volt max team Quick charge time: 30 minutes Fuel gauge provides an easy check on available power level Initial no-load voltage, when fully charged, peaks at 80 volts; nominal voltage under typical load is 72 volts