Symptoms
- Pressing the power button does nothing, no lights at all
- No response when plugged into a charger either
- Power bank hasn't been used or charged in a long time
- Button feels physically stuck or unresponsive
Likely causes
- CommonBattery drained below the safety cutoff voltageMany power banks intentionally go completely silent below a certain charge level to protect the cells.
- CommonCharging cable or adapter not delivering enough power to wake itA weak charging source may not be enough to bring a deeply discharged bank back.
- PossiblePower button is stuck or damagedPhysical wear can prevent the button from registering a press.
- PossibleInternal battery or circuit has failed permanentlyVery deep or prolonged discharge can permanently damage lithium cells.
- Less commonBuilt-in safety fuse has blownA single event like a short can trip an internal fuse that isn't user-replaceable.
What to do
- Plug the power bank into a wall adapter (not a computer USB port) using a good cable.
- Leave it charging, untouched, for a full 1–2 hours before testing the button again, since a deeply drained unit can take time to respond.
- Try holding the power button for 10–15 seconds while plugged in, since some models need a manual reset.
- Inspect the button for visible damage or debris that might be blocking it.
- If there's still zero response after an extended, undisturbed charge attempt, the battery has likely failed permanently.
Tools and parts
- Wall adapter
- Charging cable
Replacement power bankSearch: “portable power bank charger”
When to call a pro
There's no repair for a permanently failed internal lithium battery in a power bank; replace the unit and recycle the old one at a battery drop-off.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.