DeWalt batteries are considered as one of the best and durable batteries in the market at the moment. Dewalt Flexvolt is the only battery system that can be switched from 18 V to 54 V
Festool 18 V batteries have many innovations you can’t find from any other battery system, such as Airstream air cooling and Bluetooth functions. These innovations make the Festool chordless power tools as one of the most user convenient for their users.
Mafell CAS – batteries are cross-functional with Metabo's and seven other manufacturers' power tools. They are also well known for their durability and excellent performance in extreme conditions.