Replaced PS3 controller battery with old cell phone battery to avoid buying new controller. Should I be worried? It's not pretty, but it seems to work fine takes a charge again! :
How To Charge Your PS3 Controller (DualShock 3 Troubleshooting Guide)
How to Charge a PS3 Controller: 10 Steps (with Pictures) - wikiHow
Amazon.com: Controller 2 Pack for PS3 Wireless Controller for Sony Playstation 3, Double Shock 3, Bluetooth, Rechargeable, Motion Sensor, 360° Analog Joysticks, Remote for PS3, 2 USB Charging Cords, Black : Video Games