AS 2 Battery: Powerful 10.8 V battery for AS System tools
Compatible with the tools in the STIHL AS System. 10.8 V Lithium-Ion battery, weighing 0.22kg. Designed to be well-balanced in all AS System tools. 
AS 2 batteries feature intelligent battery management system - this clever technology gives a constant level of power whether the battery is 100% charged or 1% charged. 
 
 For a full list of AS 2 working times, click here.
AS 2 battery charger times:
80 minutes using the AL 1 charger
50 minutes using the AL 5 charger or AL 5-2 charger
Please note that the AS 2 battery is not compatible with the HSA 25 shrub shears.