A good tool is one that you don't need to think about. And with this backup 20V Lithium Ion battery for your trusted UNIMAC nail gun, you can rest assured that you will keep firing away. Slip its slim, compact design into your pocket or tool belt and forget about it - it will be right there when you need it. Featuring the latest Li-Ion technology, the UNIMAC gives you the optimal performance in the smallest package, and you can leave it unused without having to worry about memory effects or loss of charge. It's all you need to charge ahead.