The AP 180 for maximum performance. A very powerful lithium-ion battery with a voltage of 36V, with a higher capacity for longer run times. With charge indicator LED’s. Can be charged in AL 100, AL 300 and AL 500 charger units. Compatible with all STIHL cordless machines. Battery Power 178Wh. Capacity 4.2Ah. Weight 1.7kg. Charge time using AL 100 : 80% Charge 160 minutes, 100% Charge 210 minutes. Charge time using AL 300 : 80% Charge 40 minutes, 100% Charge 70 minutes. Charge time using AL 500 charger 80% Charge 25 minutes, 100% Charge 30 minutes.