Book Repair

When a phone won’t charge, the cause is almost always one of four things: a bad cable or power adapter, a charging port packed with lint, a worn-out battery, or a safety feature that paused charging on purpose. You can usually figure out which one in about five minutes with what you already have at home, and often the fix costs nothing.

We repair phones every day at our shop in Zanesville, Ohio, and the pattern on our bench is consistent. Most phones that come in with a “dead charging port” don’t need a new port. They need the pocket lint pulled out. The ones that do need a new part often got there because someone went after the lint with a paperclip first. This guide walks through the same order we use to diagnose charging problems, what you can safely try yourself, and the point where it makes sense to hand it to a tech.

Key takeaways

In this article

First, rule out settings and safety pauses

Modern phones stop charging on purpose more often than most people realize. Before you buy a new cable, look at the screen and your battery settings for one of these.

It stops at 80 percent

Every recent iPhone uses Optimized Battery Charging, which learns your routine and holds the charge at 80 percent until shortly before you usually unplug. iPhone 15 and newer models also let you set a hard charge limit. Samsung Galaxy phones have a similar feature called Battery protection (Settings > Battery), and Pixel phones have Charging optimization with a “Limit to 80%” option. All of these exist to slow battery wear. If one is turned on, your phone isn’t broken. It’s being careful.

Heat can cause the same thing. Apple notes that an iPhone may hold charging at 80 percent when the battery gets too warm and pick back up once it cools.

It says “Charging On Hold”

Since iOS 16, an iPhone pauses charging when it gets too hot or too cold and shows a Charging On Hold message on the Lock Screen. Apple’s explanation is here. Charging resumes by itself once the phone returns to a normal temperature. Android phones do the same thing, sometimes without telling you. Take the phone off the dashboard or out from under the pillow, pull it out of a thick case if it feels warm, and give the games a break while it charges.

It says liquid or moisture was detected

That gets its own section below. The short version: unplug it and let it dry.

It says the accessory isn’t supported

On an iPhone, this alert can mean a dirty or damaged port, a damaged or uncertified cable, or a power adapter that isn’t designed to charge phones. On Android, the equivalent is a “Check charging accessory” notification. Either way, the test below will sort it out.

The 5-minute test: cable, adapter, port, or battery?

Work through these in order. Each step rules something out, so by the end you’ll know where the problem lives.

  1. Swap the cable. Try a cable you know works, ideally one that’s charging another phone right now. Cables fail more than anything else in the chain, usually right at the plug where they bend. A frayed jacket or a plug that feels loose on the cord is a giveaway. Try the suspect cable on another phone too. If that phone won’t charge either, you’ve found your problem.
  2. Swap the power source. Use a wall adapter plugged directly into a wall outlet. Laptop USB ports, car chargers, and old 5-watt cubes can charge so slowly that a phone in use actually loses battery while it’s plugged in.
  3. Watch the plug go in. The connector should seat fully with a small click and sit flush against the phone. If it stops short, wiggles, or only charges when you hold it at an angle, something is in the port or the port is worn.
  4. Try a wireless charger, if your phone supports it. This is the most useful test at home, and a lot of guides skip it. Wireless charging bypasses the port completely. If the phone charges normally on a pad but not with any cable, the battery is fine and the port is the problem. If it won’t charge either way, look harder at the battery or the phone itself. Most iPhones from the iPhone 8 on support Qi wireless charging, as do most mid-range and flagship Android phones. Many budget phones don’t.
  5. If the screen stays black, give it 30 minutes. A fully drained battery can take a while to show any sign of life. Leave the phone on a known-good wall charger for half an hour, then force restart it. On an iPhone 8 or later: press and release volume up, press and release volume down, then hold the side button until the Apple logo appears. On most Android phones, hold the power and volume-down buttons together for about 20 seconds. Still black? Call the phone from another phone. If it rings or vibrates, the phone is on, and charging may be fine. The screen is the problem, and our guide to phone screen repair costs is the better place to start.

How to clean a phone charging port without damaging it

Pockets are full of lint, and every time your phone slides into one, a little more gets pushed into the port. Every time you plug in, the cable packs it tighter against the back wall. After a year or two, it forms a felt pad thick enough that the plug can’t reach the contacts. Nothing is broken. It just can’t connect.

Here’s how to clear it safely:

  1. Power the phone off completely.
  2. Shine a flashlight straight into the port. Packed lint usually shows up as a gray or dark layer at the very back.
  3. Grab a wooden or plastic toothpick. If the tip is needle-sharp, flatten it a little first so it’s less likely to catch.
  4. Work along the inside edges and gently lift the lint from the back toward the opening. Go slowly. It often comes out in one compressed piece.
  5. On a USB-C port, stay off the thin tab in the center. It holds the contacts, and it bends if you lever against it.
  6. Plug the cable back in and check for that firm, flush click.

Now the part that matters most: what not to use. Keep SIM ejector tools, paperclips, safety pins, and anything else metal out of the port. Metal scratches the contacts and can short them if there’s any charge left in the phone. Skip cotton swabs too, since they leave fibers behind. We’d pass on canned air as well. It tends to drive lint deeper, and the propellant can spit liquid into the port.

If the lint is packed so tight it won’t budge, or you see bent, blackened, or green-crusted contacts, stop there. Cleaning a port on the bench is a quick job, and it’s a lot cheaper than replacing one that got gouged.

Liquid detected? Skip the rice

The iPhone XS, XR, and later models can detect liquid in the charging port and block wired charging with an alert until it dries. Water-resistant Samsung Galaxy phones do the same with a moisture warning. That block protects you: charging with liquid in the connector can corrode the pins and cause permanent damage.

Apple’s guidance for the liquid-detection alert is simple:

Apple also lists what not to do: no hair dryer or other heat source, no compressed air, no cotton swabs or paper towels in the port, and no bag of rice, because small particles of rice can get into the phone and damage it. Samsung’s guidance lines up. It says water in the port usually evaporates in one to two hours, and wireless charging still works on phones that support it.

There are two things the alert won’t tell you. First, the sensor only knows about the port. A phone that went into a lake, a pool, or a toilet can have water inside it even after the alert clears, and corrosion on the internal board can keep working for days. That’s worth bringing in quickly instead of waiting to see what happens. Second, if the alert shows up every time you plug in and the phone is bone dry, try a different cable. Apple notes that a damaged cable or accessory can trigger it. If it happens with every cable, the port needs service.

Signs it’s the battery, not the port

If the cable seats cleanly, the port is clean, and the phone still won’t behave, the battery is the next suspect. Lithium-ion batteries wear out with use. Apple rates the batteries in iPhone 14 and earlier models to keep 80 percent of their original capacity at 500 complete charge cycles, and iPhone 15 models at 1,000 (Apple’s battery and performance page). Past that point, you’ll feel it.

These are the signs of a worn battery:

One sign needs attention right away: swelling. If the screen is lifting away from the frame, the back is bulging, or the phone rocks when you set it on a table, stop charging it. Don’t press on it and don’t try to open it. A swollen lithium battery is a fire risk. Bring it in, and don’t throw an old swollen battery in the trash. We handle them through our electronics recycling program.

Common advice that makes charging problems worse

The internet is full of charging “fixes,” and a few of them cause the damage we end up repairing.

Propping the cable at an angle. If your phone only charges when the cable is bent a certain way, the port is either clogged or wearing out. Wedging it in place puts constant stress on the connector and the solder joints behind it. It works until it doesn’t.

Overriding the liquid warning. iPhones let you bypass the alert in an emergency. Only do it if you truly have to. Charging a wet port is how corrosion starts.

Factory resetting the phone. Several popular guides list a factory reset as the last resort for charging problems. If a restart and a software update didn’t fix it, a reset almost never will, because the problem is almost always physical. What a reset will do is erase everything that isn’t backed up. If your phone is struggling to hold a charge and you haven’t backed it up lately, do that now while it still has power.

Buying the cheapest cable at the gas station. A bargain cable that dies in a month isn’t a bargain, and poorly made cables are a common trigger for “accessory not supported” alerts. Stick with the manufacturer’s cable or a certified one.

When your phone still won’t charge: what the repair involves

If you’ve worked through everything above and your phone still won’t charge, it’s time for a tech. Here’s what that looks like at our shop.

We diagnose before we replace anything. That means cleaning and inspecting the port under magnification, testing with bench cables and chargers, and checking how much current the phone actually draws. That tells us whether the port, the battery, or something on the board is at fault. From there, the fix usually falls into one of three buckets:

Once in a while the fault is on the main board itself, like a failed charging chip. That’s less common and more involved, and we’ll explain the options and the cost before we touch anything.

Port and battery repairs don’t require wiping your phone, so your photos and apps stay put. If the phone is completely dead and what you really need is what’s on it, our iPhone data recovery service is built for exactly that. Phone repairs come with our 90-day warranty covering parts and defects.

Is the repair worth it? If the phone is otherwise in good shape, a new port or battery costs a fraction of a new phone and can keep a good device going for a long time. If it’s old enough that it no longer gets software updates, putting money into it may not make sense, and our device trade-in could be the better move. Tablets have the same charging problems and the same fixes. See our tablet repair page for those.

Phone won’t charge? Bring it to us in Zanesville

Most charging problems come down to a cable, a clogged port, a tired battery, or a setting doing its job. Run the five-minute test, clean the port carefully, and check your battery settings before you spend anything. If your phone still won’t charge after that, we’ll find out why and tell you what it costs before we fix it.

Walk in at 2561 Linden Ave in Zanesville, Monday through Friday from 10 a.m. to 6 p.m., book a repair online, or call us at 740-319-9009. Not local? Our mail-in repair service uses insured, tracked shipping.

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