I think we've had ours for five months or so. The batteries are so weak now that it'll barely pick up anything. I opened up the casing and it looks like it only has one rechargable battery...about the size of a single "C" battery. This wouldn't be so bad if you could maybe order a replacement battery, but this isn't an option, so whenever this dies you have to buy a whole new one. Great marketing by B & D, but very bad for our polluted planet.