The most common reason is misalignment between your phone and the charging coil
Wireless chargers work by creating a magnetic field that transfers energy to a coil inside your phone. If that coil and the charger's coil are not directly lined up, the charge either slows to a crawl or stops entirely. Most phones have the charging coil in the center or slightly off-center on the back. If you place your phone even half an inch to the side, charging may fail completely.
The second most common culprit is something between your phone and the charger — a phone case, a screen protector, or even a thin layer of dust. Wireless charging works through non-metal materials, but thick cases, metal phone rings, or metal-lined wallets block the signal. Even a case that worked fine six months ago may have absorbed enough dirt or moisture to interfere now.
Key Takeaways
- Remove your phone case and try charging again; thick cases and metal components block wireless charging signals.
- Center your phone directly on the charger pad, with the back of the phone flat against the surface.
- Check that your charger is plugged into a working outlet and that the cable has no visible damage or kinks.
- Restart your phone or force-restart it if the charger is recognized but charging is very slow or stops partway through.
- If your phone gets too hot during charging, unplug when ready and let it cool; overheating can permanently damage the charging coil.
How to check if the charger itself is broken
Start with the power source. Plug the charger into a different outlet in your home — not just a different port on the same power strip. Some outlets fail silently, and some power strips have a reset button that may have tripped. If you have another device that uses the same charger cable (like a lamp or another phone charger), plug that in to confirm the outlet works.
Next, inspect the cable and charging pad. Look for kinks, cracks, or exposed wires in the cable. Bend the cable gently near both ends — if it feels stiff or crackles, the internal wires may be damaged. Check the charging pad itself for cracks, burn marks, or discoloration. If the pad is hot to the touch when plugged in but your phone is not on it, the charger may be short-circuiting and should not be used.
If you have access to another wireless charger, borrow it and test your phone on that charger. If your phone charges on the other charger, your original charger is the problem. If your phone still does not charge, the issue is with your phone's charging coil, not the charger.
Why your phone gets hot during wireless charging
Wireless charging is less efficient than wired charging, so some heat is normal. Your phone may feel warm to the touch. But if it is too hot to hold comfortably, or if the charging stops partway through, your phone is overheating and protecting itself by shutting down the charging circuit.
Remove the phone from the charger when ready and let it cool for at least 15 minutes. Overheating can damage the battery and the charging coil permanently. Once it cools, try again, but this time remove any case and make sure the room temperature is not too warm. Wireless charging in direct sunlight or in a hot car will cause overheating. If the phone overheats every time you use wireless charging, the charging coil inside your phone may be failing and you may need to consider wired charging instead.
What to do if the charger is recognized but charging is very slow
Some phones show a charging icon but the battery percentage barely moves. This usually means the charger is working but at reduced power. The most common cause is a thick case or a metal object nearby — even a metal desk lamp or a phone stand with metal components can interfere. Remove the case and move any metal objects at least 12 inches away from the charger.
Slow charging can also happen if your phone is running many apps or if the screen is on. Close background apps and turn off the screen while charging. If you are using your phone while it charges, wireless charging will be much slower because the phone is using power at the same time it is receiving it.
Check your phone's settings to see if it has a battery saver or low-power mode enabled. Some phones reduce charging speed when these modes are on. Turn off battery saver, let the phone charge for 30 minutes, then turn it back on if you want.
When the charger lights up but your phone does not respond
If the charger has an LED light that turns on when you plug it in, but your phone shows no charging icon and the battery does not increase, the charger is receiving power but your phone is not receiving the signal. This usually means misalignment or a blocked signal.
Pick up your phone and look at the back. Most phones have a small circle or rectangle printed or embossed on the back — that marks the location of the charging coil. Place that spot directly in the center of the charging pad. If your phone does not have a visible marker, try placing it in the exact center of the pad, then slowly slide it in each direction until you see the charging icon appear.
If the phone still does not respond after you have tried different positions and removed the case, restart your phone. Hold the power button until the shutdown screen appears, then slide to power off. Wait 10 seconds, then press the power button again to restart. Once the phone is back on, place it on the charger again.
How to force-restart your phone if normal restart does not work
On most iPhones, press and release the volume-up button, then press and release the volume-down button, then hold the side power button until the screen goes black and you see the Apple logo. This takes about 10 seconds. On most Android phones, hold the power button and volume-down button together for 10 to 15 seconds until the screen goes black.
After the force restart, place your phone back on the charger. A force restart clears temporary software glitches that can interfere with charging detection. If your phone charges normally after the restart, the issue was a software hiccup, not a hardware problem.
When to replace your charger or phone
If you have ruled out misalignment, removed the case, confirmed the outlet works, tested another charger, and your phone still does not charge, the charging coil inside your phone is likely damaged. This is not something you can repair at home. You can switch to wired charging if your phone supports it, or contact the phone manufacturer to discuss repair options.
If the charger itself is cracked, discolored, or hot to the touch when plugged in, do not use it. Wireless chargers are inexpensive to replace — most cost between $15 and $40 depending on the brand and whether it charges multiple devices at once. A damaged charger can overheat and pose a fire risk, so replacement is the safest choice.
Frequently Asked Questions
Can I use any wireless charger with my phone?
Most modern phones use the Qi wireless charging standard, so any Qi-certified charger should work. Check your phone's manual or the manufacturer's website to confirm it supports Qi charging. Some older phones or budget models do not have wireless charging at all, so verify before buying a charger.
Does wireless charging damage my battery?
Wireless charging does not inherently damage your battery, but the extra heat it generates can wear the battery slightly faster than wired charging over many years. If you charge wirelessly every day, your battery may lose capacity a bit sooner than if you used wired charging. This is a trade-off for convenience, not a defect.
Why does my phone charge on one charger but not another?
Different chargers have different power outputs and coil positions. A charger that works fine for one phone may not align properly with another phone's coil, or may not deliver enough power. Try adjusting the phone's position on the new charger, or test the new charger with a different phone to see if the problem is the charger or the alignment.
Is it safe to leave my phone on the charger overnight?
Most modern phones have software that stops charging once the battery reaches 100 percent, so leaving it on overnight is generally safe. However, the phone will still generate some heat, which can wear the battery over time. If you charge overnight regularly, consider removing the phone from the charger once it reaches full charge, or use a charger with a timer feature if available.
Can I charge my phone wirelessly if it has a metal case?
No. Metal blocks wireless charging signals. If your case has any metal components — including metal rings, metal plates, or metal-lined edges — remove the case before charging. Aluminum cases, stainless steel frames, and even some decorative metal accents will prevent charging from working.