You put your phone on charge overnight, and in the morning it’s at zero percent. Or it charges, but painfully slowly: it gains 15% in an hour and stalls. People ask us about this all the time, and the first question is always the same: what broke — the cable, the adapter, or the port in the phone itself? Let’s break it down step by step.

Why an iPhone stops charging

There are several causes, and they vary greatly in severity. The most harmless is dirt in the port or a dead cable. The most troublesome is a faulty charging board or a swollen battery. In between these extremes, there are plenty of possibilities.

Most often, the cable is to blame. Lightning and USB-C cables are fragile, especially near the connector. Bend it over the edge of a desk once, wrap it tightly around the charger a second time — and the wires inside are already frayed. Externally, the cable might look completely fine, but there's no contact.

Adapters fail less often, but it still happens. Especially cheap uncertified chargers — they can simply stop supplying the required voltage. The charging icon appears on the phone, but the battery level doesn't go up.

The port itself is a whole other story. Pocket lint, dust, and crumbs pack into it over time. The connection is lost, and the phone fails to detect the cable. Or the port is mechanically damaged — the cable was yanked out roughly, shifting something inside.

What to check yourself — step by step

  1. Try a different cable. Preferably an original Apple or MFi-certified one. If it starts charging with a different cable, the culprit has been found.
  2. Try a different adapter and a different wall outlet. Sounds obvious, but we’ve had customers who couldn't charge their phone for two days simply because of a tripped circuit breaker.
  3. Clean the port. Take a toothpick or a wooden skewer and gently probe inside. You’d be surprised by how much compressed lint can accumulate there. Do not use metal objects — you'll scratch or short the pins.
  4. Restart your phone. It rarely helps, but sometimes iOS simply glitches when communicating with the power controller. It’s a quick check that costs nothing.
  5. Check wireless charging. If you have an iPhone 8 or newer, place it on a MagSafe or Qi charger. If wireless works while wired charging doesn't, the issue lies in the port or the cable, not the motherboard or the battery.

Real-life examples

Recently a customer brought in an iPhone 13 — the owner said it wouldn't charge at all and assumed the battery had died. We looked inside the port — there was a layer of lint as dense as felt in a winter coat. We cleaned it in five minutes, and the phone came back to life. Diagnostics are free; port cleaning starts from 300 rubles.

Another case: an iPhone 12 Pro charging very slowly, reaching only about 40% overnight. It turned out the cable had an internal fracture near the base, causing unstable contact. Replacing the cable solved the issue. But sometimes the cable is fine, and slow charging is caused by a degraded battery that can no longer take normal current. You can't figure that out without proper diagnostic measurements.

When you definitely need a technician

If you've swapped the cable and adapter, cleaned the port, and it still doesn't charge or behaves erratically, it's best not to tinker any further on your own. Especially if you notice any of the following:

  • the phone gets hotter than usual while charging;
  • the battery percentage jumps around — 50%, then 30%, then 50% again;
  • the iPhone shuts down at 20–30% charge;
  • the port feels loose or something crunched when plugging in;
  • the phone has been exposed to water — even if it seemed to work fine afterward.

These symptoms point to issues with the battery, power management IC, or hidden damage to the port. You can't diagnose this without professional equipment.

Stop by iClub Service — diagnostics are free, and we’ll give you an honest assessment of what’s wrong and how much the repair will cost. We are located at 35 Kommunisticheskaya St in Novosibirsk.