Symptoms
- Charging begins normally but percentage stops climbing partway through
- Charging icon disappears on its own while still plugged in
- Phone feels warm right when charging stops
- Unplugging and replugging temporarily restarts charging
Likely causes
- CommonLoose cable or port connection interrupted mid-chargeA connection that isn't fully seated can drop out partway through, especially if the phone is moved.
- CommonThermal protection pausing charging when the phone gets too warmiOS deliberately pauses charging if internal temperature rises too high, resuming once it cools.
- PossibleA degraded battery unable to accept a full charge reliablyAged batteries can accept charge unevenly, sometimes stalling before reaching 100%.
- Less commonA failing charging IC on the logic boardA hardware fault can cause charging to start but not sustain correctly.
What to do
- Check if the phone feels warm when charging stops, which points to thermal protection rather than a fault.
- Move the phone to a cooler spot with better airflow if it was in direct sun or a hot room.
- Remove the case while charging to help heat dissipate.
- Ensure the cable is fully and securely plugged in at both ends.
- Try a different cable and adapter to rule out an intermittent connection.
- Note the percentage where charging typically stops, since a consistent number suggests a specific cause worth tracking.
- Restart the phone to clear any stuck charging state.
- If it stops at inconsistent percentages with no heat involved, have the battery and charging circuitry checked.
When to call a pro
If charging repeatedly stalls with no heat involved and known-good accessories, have the charging circuitry and battery inspected professionally.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.