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! :
3.7V 1800mAh Rechargeable Battery for Playstation 3 PS3 Gamepad Controller Replacement Power Battery with USB Data Charger Cable - AliExpress
Sony PS3 Dualshock Battery LIP1359 + Tool-kit
PS3 Playstation 3 Controller Pad Battery Dualshock Sixaxis LIP1859 LIP1359 | eBay
Recently bought a used DS3 controller, and this is the battery that was installed. This can kill, people. Seriously. : r/PS3
Battery 1800 mAh for PS3 controller
Amazon.com: Starnovo 1250mAh 3.7V LIP1472 LIP1859 Replacement Battery for Sony PS3 Playstation 3 Dualshock 3 SIXAXIS Wireless Controller, CECHZC2E, CECHZC2U : Video Games
PS3 Wireless Controller Enhanced Remote Gampad Joystick Compatible for PlayStation 3 Double Vibration PS3 Controller BLUE - Walmart.com
Sony PlayStation 3 Dualshock Controller OTB Battery - 950mAh
Amazon.com: PS3 Rechargeable Battery Pack : Video Games
PS3 Controller Battery,(1800mAh) LIP1359 Battery Replacement for Sony Playstation 3 PS3 Dualshock 3 Wireless Controller CECHZC2E, CECHZC2U with Installation Tools : Amazon.ca: Video Games
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
Battery 3.7V Li-ion battery for wireless controller Dualshock 3 Playstation 3 LIP1359, LIP1472
Sixaxis - Wikipedia
2X Replacement Battery For Sony Playstation 3 PS3 Wireless Controller LIP1359 | eBay
How to Replace a Battery for a PS3 Controller - YouTube
Amazon.com: PS3 Controller Rechargeable Battery Pack : Video Games
Wireless PS3 Controller Compatible for PlayStation 3 — Battery Mate
Controller Battery With micro USB Cable for Sony Playatation 3 Slim,Playstation 3,Playstation 3 Super Slim
2x Sony SIXAXIS Controller Battery LIP1859,LIP1472
Replacement Battery compatible with Sony Playstation 3 Controller - Insten
Amazon.com: Pickle Power PS3 Controller Battery Replacement, 2 Pack LIP1359 Battery for Sony Playstation 3 PS3 Dualshock 3 CECHZC2E CECHZC2U Controller with USB Cable+Tools : Video Games