https://www.mccoys.com/shop/p/39095100/stihl-ak-30-battery-lithium-ion
Compact Lithium-Ion battery for the COMPACT cordless power system with a voltage of 36 V and a capacity of 180 Wh. Battery life depends on the device type. With charge level indicator (LED).
Type
Compact
Battery Chemistry
Lithium-Ion
Battery Voltage
36
Suitable for
AL 101, AL 100, AL 300 and AL 500 Chargers