Compact Lithium-Ion battery for the AK System with a voltage of 36 V and a capacity of 144 Wh. Battery life depends on the device type. With charge level indicator (LED). Compatible with AL 101, AL 301 and AL 500 chargers. 144 Wh of battery power, weight 1.2 kg Lightweight lithium-ion battery Compatible with all power tools in the STIHL cordless AK system 4 practical LEDs for indicating charging status and power content
