I have one that I've had for over ten years and it's been a dang goodun. It's a Hitachi 1/4" driver drill/impact driver. The first two original batteries died on it about two years after I bought it new. I contacted the Hitachi service center in Georgia and was told to send them there. About two weeks later, I received two brand new batteries free of charge. Caint beat service like that and I've been using it ever since.