I've seen them in several CVS's around here, dunno if they'd be in any drugstore in your area. Like Zach said .. great if you need battery life in a pinch (for example, on vacation and the charger is packed away in depths of luggage) but not economical in any other situation. I can't imagine it retaining its battery life say if you stored it in the glovebox .. or especially for regular use if that's what you plan it for. For the money you sould definitely get a new battery for your phone.
