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! :
PS3 controller not charging solution guide
Repair: Replacing a dead PS3 Dualshock 3 controller battery – Darian Cabot
impulsegamer.com - Replacing the battery in a PS3 DualShock Controller - impulsegamer.com
Amazon.com: Batmax 2Pc LIP1359 Battery Replacement for Sony PS3 Playstation 3 Controller Sixaxis Dualshock 3 CECHZC2E CECHZC2U : Video Games
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Sony SIXAXIS Controller Battery LIP1859,LIP1472
How to Replace a Battery for a PS3 Controller - YouTube
Amazon.com: MPF Products 570mAh LIP1359 Battery Replacement Compatible with Sony Playstation 3 PS3 Dualshock 3 Wireless Controller CECHZC2E, CECHZC2U with Installation Tools : Video Games
Repair: Replacing a dead PS3 Dualshock 3 controller battery – Darian Cabot