Does your iPhone keep a charge? Every battery has a set amount of charges that it can perform efficiently. As a result, if you use your iPhone a lot and need to charge it constantly. If you are noticing your iPhone charge rapidly fluctuating. Or if your iPhone is randomly restarting, you may need a new battery. Gadget Fix will replace your iPhone 7 Plus battery and test to confirm everything is working. Best of all, new batteries can be installed in a few short hours.