For use with the Stihl Compact Cordless System, the AK10 is a 36v rechargeable lithium battery with a capacity of 72 Wh. It features an LED charge level indicator. Compatible with AL 101, AL 300 & AL 500 chargers. Charged to 100% with AL 101 charger: 205 mins Charged to 100% with AL 300 charger: 60 mins Charged to 100% with AL 500 charger: 60 mins Specification: Battery Type: Lithium-ion Battery Battery Voltage: 36 V Battery Capacity: 1.6 Ah Weight: 0.8kg Warranty: 2 Year