Since official Apple Stores typically do not service the iPhone 4 anymore, you will need to rely on independent retailers:
"New" batteries for this model are often old stock that may have degraded even while unused.
Check small electronics repair kiosks in local malls. buy iphone 4 battery locally
Local shops may charge a small service fee, but some may refuse the job due to the risk of damaging aged internal ribbons.
A successful swap can restore the phone's ability to hold a charge for basic tasks like music or nostalgia, sometimes lasting up to 2 days on standby. How To: Replace the iPhone 4's Battery in 2 Minutes Since official Apple Stores typically do not service
Be cautious of "swollen" batteries (bulging cases). These are fire hazards and should be handled with extreme care. 🛠️ Replacement Tools Required
Ensure you buy a battery specifically for the iPhone 4 . The iPhone 4S battery has a connector on the opposite side and is not compatible. A successful swap can restore the phone's ability
To remove the internal battery connector screw.