Ion 40 Volt Lithium Spare BatteryShipping Notice: This lithium battery, cannot be shipped by air and is therefore unavailable for delivery to Northern Arctic regions where air transport is required. We appreciate your understanding. 4 Amp Hour, 40V MAX, Lithium ion Rechargeable Charge indicator lights on the back Cross compatible with all Gen 1 and Gen 3 ION auger models 3 Year Limited Warranty Compatible with Gen 1 and Gen 3 auger models.