It has a capacity of 2.1 Ah and is designed specifically for the AS2 model. The battery is made in Germany and weighs only 0.22kg, making it easy to carry around. Model: AS2 / suitable for GTA 26, HSA 26, SEA 20, FSA 30, HSA 30, HSA 40, KOA 20, ASA 20, RCA 20.
Battery arrived and was almost fully charged upon receipt. Tested the battery in the product I have from Stihl and it works perfectly. This gives me the extra battery I need to keep going when I am using the tool.