To extend the lifespan of your battery, if the battery gets too warm, software might limit charging above 80 percent. Your iPhone will charge again when the temperature drops. Try moving your iPhone and charger to a cooler location. With iPhone 15 models, you might have turned on 80% Limit, which stops your iPhone from charging past about 80
Testing & comparing the battery life of iPhone 15 Pro Max, 15 Plus, 15 Pro, 15, 14 Pro Max, 14 Plus, 14, 13, 12, 11 and SE (2022).~Check out my other videos: Testing and comparing the battery life of iPhone 13 Pro Max, 13 Pro, 13, 13 Mini, 12 Pro Max, 12 and 11!~My favourite charger for iPhone 13: iPhone Battery Life Drain Test in 2023 After iOS 16.3.1 - iPhone 8 vs SE 2020 vs XR vs XS Max vs 11 vs 13 vs 12 Pro vs 11 Pro Max vs 12 Pro Max vs 13 Pro Max The Apple iPhone 12 Pro Max supports fast battery charging via USB Power Delivery. Apple ships the 12 Pro Max without a charger, but you can opt for Apple's 20W PD charger or any other 20W+ USB-PD power adapter. If you recharge your dead iPhone 12 Pro Max with Apple's 20W charger, it will refill 55% of its battery in 30 mins and 86% in 60 mins. Apple iPhone 14 Pro Max specs compared to Apple iPhone 11 Pro Max. Detailed up-do-date specifications shown side by side. Battery: Type: Li-Ion 4323 mAh, non-removable (16.68 Wh) eRQr1mN.