Iphone 7 Battery Goes From 100 To 1. To go one step further disconnect your device from Wi-Fi or a cellular connection. One of the most annpying battery maishaps.

This behavior is normal and will help to prolong the overall life of the battery. This kind of battery-drops. Answer 1 of 4.
I wouldnt advise anyone replace it.
Answer 1 of 3. When a battery reaches a point were the battery can not produce the required current that the system is requesting they will become problematic in this way and others. The battery may appear to stop charging between 93 percent and 99 percent. Until about 2 weeks ago the battery level dropped from 63 to 1 in split second while I was using it.

