BGA 57 battery blower in a set with AK 20 battery and AL 101 standard charger: for efficient cleaning of smaller areas If you want to save time, the BGA 57 battery blower is the tool for you.  Lightweight and well balanced, this battery blower is easy to use and with its adjustable tube, it fits you perfectly. High blowing force easily clears debris, twigs and dirt on your property. The BGA 57 replaces the BGA 56 in the AK tool system which includes grass trimmers, hedge trimmers, chainsaws and lawn mowers – all powered by interchangeable batteries.