The Pixel 9 Pro Fold has two batteries, with the main battery typically being the larger one. If your phone is dying quickly, shutting down unexpectedly, or not holding a charge, the main battery may be failing. At My Cell Repair in Santa Rosa, California, we offer Pixel 9 Pro Fold main battery replacement. We carefully open the device, disconnect the main battery, and install a high quality replacement. We test the new battery thoroughly before sealing everything back up. Most main battery repairs are completed the same day. Just drop by our Santa Rosa shop.