iPhone 3GS / 3G Dock and External Battery Pack Reviews
Battery Upgrade Kit - iPhone 3GS
For 616-0434 For Iphone Apple 3gs Battery 3 Generation Mobile Phone Battery - Rechargeable Batteries - AliExpress
I was planning to use my old iPhone 3GS for weekend project but I discovered that the screen was popped out and the back was bulging, I took it apart and this
File:Expanded lithium-ion polymer battery from an Apple iPhone 3GS.jpg - Wikimedia Commons
Original Antirr Replacement Battery For Apple iPhone 3GS 8gb 16gb 32gb 616 0431 616 0433 616 0435 616 0436 MC137LL 3790233|Digital Batteries| - AliExpress