Double the battery, double the runtime! Introducing the A20-BatteryDoubler battery adapter for the A20-Mini. -Double the battery run time of your A20-Mini. With the A20-BatteryDoubler’s two NP-BX1 batteries, expect up to 9 hours battery run time. -Easy and quick to fit. Swap the BatteryDoubler back and forth with the standard A20-Mini battery door in seconds. -Super-compact. With the BatteryDoubler fitted, the A20-Mini’s height and width are unchanged. Only its depth is increased. -Dual NP-BX1 charging. Both batteries are charged simultaneously when the A20-Mini is connected to a USB-C power source. -Water-resistant. With the BatteryDoubler’s door closed, the A20-Mini is resistant to water and sweat. -Compatible with the PowerStation-8M charging, file transfer, and timecode station. Charge up to eight A20-Minis or four when fitted with the BatteryDoubler.