iPhone 13 battery health and charging

Charging: Lightning, about 20 W (up to about 27 W on the 13 Pro Max) with a USB-C Power Delivery adapter. Wireless: MagSafe up to 15 W (12 W on the mini), Qi 7.5 W.

Updates: Runs iOS 26, with several more years of updates likely.

How to check iPhone 13 battery health

1. Open Settings › Battery › Battery Health & Charging (on iOS 17 and later it may be Settings › Battery › Battery Health). Maximum Capacity is the battery’s health.
2. Open Settings › General › About and scroll to Parts and Service History. A battery listed as “Unknown Part” wasn’t fitted with Apple’s tools; the health percentage won’t show for it.
3. If Peak Performance Capability says the phone had an unexpected shutdown, performance management is on: the battery can’t deliver peak power and needs replacing.

What to know about the iPhone 13 battery

• The 13 has noticeably better battery life than the 12; the 13 Pro Max is one of the longest-lasting iPhones of its era.
• A replaced screen or battery shows up in Parts and Service History (Settings › General › About). Check it, and check that Face ID and True Tone still work: both can break after a cheap repair.
• Optimized Battery Charging (Settings › Battery › Battery Health & Charging) holds the charge at 80% overnight. A seller may mistake that for a charging fault.

iPhone 13 won’t charge: what to try

1. Try another Lightning cable and charger you know work. A damaged cable is the most common cause.
2. Clean the port. Lightning ports fill with pocket lint that stops the plug seating fully; ease it out with a wooden toothpick, never metal.
3. Restart the phone. A software glitch can stop charging until the next restart.
4. If it stops at 80%, that is Optimized Battery Charging or the charge limit, not a fault. It resumes later or can be turned off in Settings › Battery.
5. Try wireless charging, if the model supports it. If wireless works and cable doesn’t, the port or its flex cable is the problem, not the battery.
6. If it drops from 20–30% to off, or shows a sudden jump in percentage, the battery is worn and needs replacing.

Still not charging? Open mxmob.com/check and run the charging test: it shows the instant the phone sees power, so you can tell a dead port from a dead battery. Our battery test shows the charge level, charging state and estimated time to full.

Buying a used iPhone 13?

Ask the seller for a screenshot of the battery health screen before you travel. When you meet, run the free hardware test on the phone itself, check the IMEI with our IMEI checker, and see our price checker to know what a fair price is. A battery under 85% is a reason to ask for less, not always a reason to walk away.