Troubleshooting questions

Latest questions in Troubleshooting

• Why does my wireless charger only work when the phone sits in one exact spot? Wireless chargers need the coil in the phone and the coil in the charger to line up, and the tolerance can be small.
• Is it safe to leave a power bank charging overnight? A good, certified power bank in good condition has protection circuits that stop charging when it is full, so overnight charging is generally considered acceptable.
• Why do plug blades come out of spec on length or spacing in some lots? Common causes are tooling wear, a moulding process that moves the blades, inconsistent blade material or bending, and a change of supplier or lot.
• Why does a charger stop charging after 30 minutes? Most often it is a protection feature: the charger or phone gets hot and cuts power until it cools.
• Why does my phone vibrate every time it touches the wireless charger? Many phones vibrate once to confirm that charging has started, which is normal.
• Why does an AM radio or Wi-Fi speaker crackle near a charger? Chargers switch power at high speed and can produce electrical noise that AM radio picks up.
• Why does a charger miss its efficiency target at 10 percent load? At light load the useful output is small, so fixed losses weigh more.
• Why does a tablet say ‘charging’ but the battery percentage falls? The power coming in is less than the power the tablet is using.
• Why does my phone screen flicker or buzz on a wireless charger? A faint buzz is often coil or component noise and can be normal, but flicker or loud buzzing points to interference or an unstable link.
• Is it OK to leave a charger plugged into the wall all the time? For a good, certified charger in good condition, it is generally fine.
• Why does burn-in find early failures from one component lot? Burn-in runs units under stress to bring out weak parts early.
• Why does a charger work in the office but not in a vehicle inverter or hotel socket? The power source is different.
• Why does a phone keep connecting and disconnecting on a wireless pad? The connection is unstable.
• What are the warning signs that a charger or cable should be thrown away? Throw it away if you see exposed wires, cracks, melted or discoloured plastic, bent or loose plug blades, burn marks, a burning smell, sparks, a buzzing sound with heat, or if you ever feel a tingle or shock.
• Why do charger labels peel or smudge after the climatic test? The label material, adhesive, ink or the shell surface was not suited to heat and humidity.
• How can I make my phone charge faster? Use a charger and cable that match your phone's fastest supported charging, plug into a wall socket and not a computer, turn the screen off or use airplane mode, keep the phone cool and take off a thick case.
• Why does a wireless charger stop when a coin or key is nearby? No, that is usually a safety feature.
• What does a charger’s LED flashing red or green mean, and who decides? There is no universal code.
• Why does output voltage vary between units in the same batch under load? Some variation is normal.
• Why does my phone only charge when the cable is held at an angle? Usually the cable, the phone's port or the plug is worn, loose or full of lint.