Symptoms
- Third-party charger doesn't charge the phone at all
- Charging is very slow with a third-party charger but fine with the original
- A warning about the charger or cable appears on screen
- Charger works with other devices but not this phone
Likely causes
- CommonCharger doesn't support the phone's specific fast-charging protocolMany Android phones use a proprietary or specific fast-charge standard that generic chargers don't negotiate correctly.
- CommonCharger or cable isn't rated for the needed wattageLow-power chargers can fail to charge efficiently or at all under certain conditions.
- PossibleDamaged or low-quality cable paired with the chargerEven a good charger can fail with a bad cable.
- PossibleCounterfeit accessoryCounterfeit chargers sometimes physically resemble certified ones but lack proper internals.
What to do
- Check the charger and cable for certification markings or documentation.
- Test the same phone with the original manufacturer charger and cable to confirm the phone itself charges fine.
- Try the third-party charger on another phone or device to see if it works at all.
- Look for any on-screen warning about the accessory when connecting.
- Replace just the cable first, since cables fail more often than the charger block itself.
- Avoid unusually cheap or unbranded chargers, especially for higher-wattage fast charging.
- If the charger works but very slowly, check its actual wattage rating against what the phone needs for fast charging.
- Stick with original or certified accessories going forward if you find the phone works fine with those.
Tools and parts
Manufacturer-certified charger and cableSearch: “original fast charger for your Android phone model”
When to call a pro
This is an accessory compatibility issue, not something a repair shop needs to fix, unless the phone also fails to charge with its original accessories.
Safety
Generally low risk
Generally low risk for a careful person. Stop if anything looks different from what this guide describes.