What's going on

Wireless charging relies on electromagnetic induction to transfer power between two copper coils—one inside your charging pad (the transmitter) and one glued inside the back of your phone (the receiver). When everything lines up properly, magnetic fields generate an electric current that feeds directly into your phone's battery logic board.

If that power transfer stops, it is rarely a sign that your main battery is completely dead—especially if wired charging still works. Instead, the connection is usually interrupted by physical spacing issues, inadequate input power from the wall, thermal protection features kicking in, or a corrupted software state managing the battery's safety controls.

Symptoms people notice

• The charging pad LED flashes continuously or turns red to signal an error.
• The phone icon switches to charging for a brief moment, then immediately drops out.
• The phone becomes excessively hot while resting on the pad, but the battery level doesn't increase.
• Wireless charging functions normally when the phone is bare, but fails through a protective case.
• Power delivery works only when the phone is propped up or shifted slightly off-center.
• Wired charging via the USB-C or Lightning port works fine, but inductive charging yields zero response.

Likely causes

1. Case interference or metal obstruction: Thick rubber armor, heavy-duty kickstands, metal ring mounts, or magnet plates for magnetic car mounts will block the magnetic field completely or trigger Foreign Object Detection (FOD).
2. Insufficient input wattage: Wireless pads require robust input power. Plugs connected to standard 5V/1A USB wall blocks often cannot deliver enough wattage to drive wireless induction.
3. Coil misalignment: Qi technology typically requires the coils to be within 5mm to 10mm of direct alignment. Being off by even half an inch can stop energy transfer.
4. Software locks and thermal protection: Smartphones intentionally shut off wireless charging when internal temps spike to protect the lithium-ion cell from heat degradation.
5. Damaged receiver coil: Dropping the phone can tear or disconnect the delicate internal Qi flex cable located under the rear glass.

Quick checks first

Before opening up hardware or purchasing replacement parts, rule out external factors with these quick tests:

• Ditch the case: Strip the device down completely so the back glass touches the charger directly.
• Swap wall adapters: Make sure the wireless base is plugged into a wall brick rated for at least 15W–18W with Quick Charge or Power Delivery support.
• Let the device cool down: If your phone was recently running intense applications or sitting in direct sunlight, leave it off for 15 minutes before attempting to charge.
• Force restart: Perform a hard reboot to reset the power controller sub-routines on your phone's operating system.

For additional troubleshooting steps on common phone hardware issues, explore our comprehensive /guides library.

When it's a real repair

If you have verified that your charging pad works with other phones, but your phone refuses to charge on any wireless charger—even without a case—you are likely facing a hardware failure inside the device.

Common physical repair scenarios include:

• Disconnected Wireless Charging Flex: A drop can pop the Qi coil's press connector off the main logic board.
• Torn Qi Coil Assembly: Deep cracks on the back glass can rip the thin copper coil or NFC combo pad underneath.
• Motherboard PMIC Failure: The Power Management Integrated Circuit responsible for regulating incoming induction voltage may be shorted.

If you are suspecting secondary problems like port damage from constant plug-ins, check out our guide on troubleshooting /problems to diagnose full system power issues.

DIY vs professional repair

Fixing a wireless charging coil DIY-style requires opening the phone by heating and lifting the rear glass. On modern glass-sandwich smartphones, this process carries a high risk of cracking the back panel or tearing sensor cables if you are inexperienced.

• DIY Approach: If you have prior repair experience, replacement Qi coil assemblies are relatively inexpensive. You will need a heat gun or iOpener, suction tools, guitar picks, precision screwdrivers, and replacement back glass adhesive.
• Professional Repair: If heating and prying glass sounds intimidating, sending the device to a technician or using mail-in repair services through LML Experts is recommended. They can test the board line with a multimeter to ensure the fault is the coil rather than an expensive motherboard issue.

Read our unbiased /reviews on popular repair toolkits and parts vendors if you decide to tackle the job yourself.

Next steps

1. Cross-test equipment: Verify the pad on another device and test your phone on a secondary charger.
2. Inspect the rear glass: Look for fine cracks near the center of the phone that might indicate physical coil or flex cable damage.
3. Back up your device: If internal hardware is failing, back up your data to cloud storage or a computer immediately.
4. Choose your path: Check out our step-by-step disassembly /guides to see if you have the tools for a DIY internal replacement, or consult a local repair specialist.