Batteries and chargers are the weak point for these I have used the drivers I have 2 for years they made a good driver but I have been through so many batteries and chargers I have lost count, I have spent way too much on replacement batteries and chargers, it is so darn comfortable and easy to use that I keep buying them but I see there is a different company making one very similar for less than the charger cost so I dare this one to go out now