Thanks to the fact that Sony's SIXAXIS controllers feature USB charging and non-replaceable batteries, your gamepads are going to have less and less charge as the months pass—and there's nothing you can do about it. Luckily for us, a spokesperson told GamesIndustry that Sony will exchange your controller whenever that day comes, saving you the $49.99 it costs to get a new one.
A Sony developer Crecente talked to said the controller would probably last one to two years, depending on usage. We would actually prefer it if the PS3 controller featured a detachable battery pack like the Xbox 360's, but if Apple still isn't making iPod batteries "easily" replaceable, it's doubtful Sony will either.
Sony to replace PS3 controllers [GamesIndustry via Kotaku]