Quick Answer An iPhone battery percentage that stays on one number may be caused by a temporary iOS display or reporting issue, an intentional charging limit, excessive temperature, a charging problem, or inaccurate reporting from a replaced battery. Restart the iPhone first. If it is stuck at 80% while charging, check Optimized Battery Charging, Charge … Read more
If your Android battery percentage is stuck on the same number, first check whether the battery reading is actually frozen or whether the phone simply is not gaining charge. Restarting the phone, checking the battery screen, testing the charger, and looking for a charging limit can usually narrow down the cause. Quick Fix Try these … Read more
If your Android phone shows the charging symbol but the battery percentage stays the same or continues to drop, the phone is detecting a charging connection but may not be receiving enough usable power to increase the battery level. The most useful first test is simple: stop using the phone, connect it to a known-working … Read more