LITHIUM-ION BATTERY TECHNOLOGY: Provides fade-free power from start to finish 50% LONGER RUNTIME: Cleans longer than the ONEPWR 2.0 Ah Battery FULLY COMPATIBLE: Every ONEPWR Battery works with Every ONEPWR Product FOUR INDICATOR LIGHTS: Displays battery charge and usage levels at a glance RAPID CHARGE TECHNOLOGY: Charges in under 3.5 hours Charger sold separately