The Profoto A-Series Li-Ion High Capacity Quickly Rechargeable Performance Fade Free Battery 2S1P in Black is apt to use for A-Series flashes. You can charge in 80 minutes with this A-Series battery charger. It lasts up to four times longer than cumbersome AA batteries with no performance fade. It clicks on and off the A-series flash in seconds. The battery is certified by UN, so you can take them on a plane, no matter what your destination.