Eskimo E40 Electric Ice Fishing Auger Battery - Full power 40V Lithium-ion battery that delivers reliable cold weather performance. Rechargable Auger Battery - 4 Amp-Hour, 148 Watt-Hour, 40V Lithium-ion rechargeable battery. Charge Indicator - Easily monitor the battery charge level with the press of a button on the back. Compatibility - Works with all Eskimo E40 electric au