Hello everyone,lately i've noticed that my iphone 16 is charging slower than its expected to do,for example in 30 minutes my battery went from 18% to only 50% which is much slower than the expected 50% in 30 min.Its really annoying and i want to ask if someone else is having this issue and what can cause this considering my phone is charged only 20times its basically brand new.I am charging with originall 20W cable and charger.
iPhone 16, iOS 18
Apple uses smart algorithms (early form of simple AI) to set the charge rate. The charge rate is dynamic, meaning it changes constantly. Sensors report individual cell conditions, temperatures, rate of charge, past usage and much more. The charge rate is adjusted every time you charge your battery and adjusts it as individual cells heat up. It’s supposed to work this way.
Monitor the charging over a period of like several weeks and you’ll get a better idea if it’s actually slowing down. But to get any meaningful data you need to look at times over 30 to 50 cycles. A few days isn’t enough data to draw a conclusion.
Apple uses smart algorithms (early form of simple AI) to set the charge rate. The charge rate is dynamic, meaning it changes constantly. Sensors report individual cell conditions, temperatures, rate of charge, past usage and much more. The charge rate is adjusted every time you charge your battery and adjusts it as individual cells heat up. It’s supposed to work this way.
Monitor the charging over a period of like several weeks and you’ll get a better idea if it’s actually slowing down. But to get any meaningful data you need to look at times over 30 to 50 cycles. A few days isn’t enough data to draw a conclusion.
Extracted from this Apple Article --> Fast charge your iPhone - Apple Support (IN)
"What you need
You can fast charge your iPhone 8 or later up to 50 per cent battery in around 30 minutes. Find testing information for various iPhone models
To fast charge, you’ll need an iPhone 16 or later with a USB-C cable, such as the one that came in the box, or an earlier iPhone model with a USB-C to Lightning cable and one of these adapters:
To fast charge wirelessly, you’ll need an iPhone 16 or later with a MagSafe Charger and one of these adapters:
For iPhone 15 and earlier, you can fast charge up to 15W with a MagSafe Charger and one of these adapters:
Fast charging may not work in conditions that are too cold or too hot.
If you're not sure which Apple Power Adapter you have, check the wattage on the top or bottom of the adapter:"
Batteries chemically change as you use them and charge them back up. Charge times will get longer and longer as your battery chemically changes. This is perfectly normal.
If you want it to charge faster, get a higher wattage charger. However, fast charging batteries produces more internal heat and slightly decreases the overall life of the battery.
thank you for the answer! I hope this is the reason because my base iphone 13 with 83% healt is charging faster and i was starting to think something was wrong with my 16.
Iphone 16 charge slow with 20W charger
