How To Know If Iphone Battery Is Damaged. Attach it to the phone. The lithium-ion batteries in iPhones and all electronic devices are consumable products.
Answer 1 of 3. Signs Its Time to Replace Your iPhone Battery. You only have 1.
First check charger and cable.
Voltmeter to measure battery voltage Use a voltmeter to measure the voltage. Go to Settings Battery and if its in bad enough shape youll see a notification at the top of that screen that says your battery needs to be serviced. First check charger and cable. From water damage to broken screens and everything in-between we can fix it.
