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! :
Amazon.com: PS3 DualShock 3 Charging Station : Video Games
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
2 Pack 10ft Charging Cable for SONY Playstation 3 PS3 Controller - Walmart.com
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Amazon.com: PlayStation 3 Dualshock 3 Wireless Controller (Black) : Video Games
How to Replace the Battery on a PS3 DualShock 3 or Sixaxis Controller | Change Out Dead or Dying - YouTube
Amazon.com: PS3 Controller Wireless for Playstation 3 Dual Shock (Pack of 2,Black and Pink) : Video Games