I bought this type Accu because my in Sixaxis controller of the Playstation 3 (no dual shock!) Had to be recharged after a short game-time. And the constant charging bugged me. I swapped this polymer Accu (1350mAh) against the original Accu with 610mAh. And the load times have become extremely rare by this new Accu. I can play about 7 days without having to recharge - about 2 hours per day use.. This Accu I can only recommend ... if you dare to open the controller and use the new Accu, absolutely no problem.