How to Replace iPhone 3G and 3GS Battery: EveryiPhone.com
Battery Issues Likely Cause of iPhone 3GS Overheating | WIRED
The Second Coming: Ars goes in-depth with the iPhone 3G | Ars Technica
Replacement Internal battery for Apple Iphone 3GS 3 G S A1303 MB715LL/A phone | eBay
Apple Stores relying on in-store contractors to catch up on iPhone battery service backlog - 9to5Mac
Apple iPhone 3GS Battery Replacement Kit with Tools, Video Instructions, Extended Life Battery and Full One Year Warranty - Walmart.com
iPhone 3GS Replacement Battery – iFixit Store
Question]My iPhone 3GS running iOS 4.1 when I open the App Store keep saying cannot connect iTunes do you know how to stop this and fix it : r/LegacyJailbreak