Battery fits all 100 Series handheld machines, which allows you to quickly switch the same battery between a trimmer, blower, chainsaw and hedge trimmer so you can keep working and is designed for demanding, long lasting use The 40 volt battery is equipped with a cooling system for fade-free power The Battery life is easy to read with the LED battery life indicator Easy to use with a simple snap on and off design Lightweight and compact for easy storage The Li-ion battery provides long lasting power and top class performance