Your iPhone is sitting on the charger and nothing is happening. Before assuming the worst, know that most iPhone charging failures trace back to something cheap and fixable: a bad cable, a lint-packed port, or a frozen software state. This guide walks through every fix in order, from free to expensive, so you can solve it without a trip to the repair shop.
Quick Answer
Start with the cheapest fix: swap in a different Apple-certified cable and adapter. If that does not work, inspect the charging port for packed lint and clear it carefully with a wooden toothpick. A force restart resolves software hangs that block charging. If none of those three steps work, the problem is likely the battery or port hardware, which means a repair or replacement decision.
Try a Different Cable and Adapter
The cable is the most common cause of iPhone charging failure, and it is the easiest thing to rule out. A frayed Lightning or USB-C cable, a loose connector, or a non-certified third-party cable can all prevent the phone from charging, sometimes with no error message at all.
What to try:
- Swap in a different cable you know works on another device.
- Use an Apple-branded or MFi-certified (Made for iPhone) cable. Non-certified cables often trigger a “This accessory may not be supported” alert, but sometimes they fail silently without any warning.
- Try a different power adapter. A faulty wall brick or a low-output USB port on a laptop may not deliver enough power for the phone to register a charge.
- Plug directly into a wall outlet rather than a USB hub, power strip, or car charger.
If the phone charges with a different cable and adapter, you have found the problem. Toss the faulty accessory and replace it with a certified one.
Clean the iPhone Charging Port
If a cable swap did not fix it, look at the port. Lint, pocket debris, and dust compact over time inside the Lightning or USB-C port and create a physical barrier between the cable connector and the charging contacts. This is one of the most frequently overlooked causes of charging failure, and it is extremely common on iPhones carried in jeans pockets.
How to clean the port safely:
- Power off the iPhone before touching the port.
- Use a wooden or plastic toothpick, not a metal object. Metal can scratch the contacts or cause a short.
- Work under a bright light and angle the toothpick along the walls of the port, gently scraping out compacted lint from the sides and bottom.
- A can of compressed air (held upright, short bursts at an angle) can dislodge loose debris after you break up any packed material.
- Do not use liquids, cotton swabs, or anything that leaves fibers behind.
After cleaning, plug in and check. It is common to pull out a surprisingly dense plug of lint from a port that looks clean at a glance. Many charging problems end here.
Force Restart the iPhone
A crashed iOS process can block charging even when the hardware is in perfect condition. The phone may show no charging indicator and no response to button presses. A force restart clears the active memory state without erasing any data or settings.
Steps vary by model:
| iPhone Model | Force Restart Steps |
|---|---|
| iPhone 8 and later (all Face ID models, including 15 series) | Press and release Volume Up. Press and release Volume Down. Press and hold the Side button until the Apple logo appears. |
| iPhone 7 / 7 Plus | Press and hold Volume Down and Sleep/Wake simultaneously until the Apple logo appears. |
| iPhone 6s and earlier | Press and hold Home and Sleep/Wake simultaneously until the Apple logo appears. |
After the restart, plug in immediately and watch for the charging indicator in the status bar or on the lock screen. If the charging icon appears, a software hang was the problem.
If the iPhone was completely unresponsive before, connect it to a known-working cable and give it 15 to 30 minutes. A deeply depleted battery may need a few minutes to reach the threshold where the display activates.
Check iPhone Battery Health
If the phone charges intermittently, drains unusually fast, or cuts off at a low percentage, the battery itself may be the root cause rather than the port or cable. A significantly degraded battery can behave erratically: refusing to charge past a certain point, shutting down unexpectedly, or appearing to charge but gaining no percentage.
To check: go to Settings > Battery > Battery Health and Charging. Note the Maximum Capacity percentage and whether a service recommendation is displayed.
As a general benchmark, 80% and above is within Apple’s acceptable operating range for normal use. Below 80%, Apple recommends battery service. A battery in poor condition does not always refuse to charge entirely, but erratic charging behavior is a strong indicator the battery is the root cause.
Battery replacement cost runs roughly $99 for most current iPhone models through Apple; authorized service providers may price it differently. Weigh the repair cost against the current market value of the phone before committing to a service.
iPhone Battery Health: What to Check on a Used iPhone
Why Your iPhone Is Charging Slowly
Slow charging is a distinct problem from no charging, and the causes are different. If the battery percentage is creeping up but taking far longer than usual, check these in order:
| Cause | Fix |
|---|---|
| Low-wattage charger (5W or older adapter) | Switch to a 20W USB-C adapter for iPhone 12 and later; use at least 12W for older models |
| Non-MFi cable limiting charge rate | Replace with an Apple-certified cable |
| Charging from a laptop USB port | Move to a wall outlet |
| Battery health below 80% | Consider battery service or a replacement phone |
| Background apps and heavy processing | Close demanding apps; let the phone idle while charging |
| Low Power Mode active | Low Power Mode reduces charge acceptance in some cases; toggle it off while charging if you need speed |
For iPhone 8 and later, the hardware supports fast charging at 18W or higher, but only with a compatible USB-C power adapter and a USB-C to Lightning (or USB-C to USB-C for USB-C port iPhones) cable. The included Apple adapter, if any, may not be the fast-charge model.
When the Charging Port or Battery Needs Service
If you have swapped the cable, cleaned the port, restarted the phone, and battery health looks fine but the problem persists, the charging port hardware itself may be damaged. Bent or corroded pins inside a Lightning or USB-C port, moisture exposure residue, or a physically damaged connector all require a professional repair.
Repair-vs-replace decision table:
| Situation | Likely Path |
|---|---|
| iPhone is under AppleCare+ | Take it to Apple. Covered repair or low-cost replacement device. |
| Phone is 1 to 3 years old, otherwise in good condition | Repair is likely worth it. Port repair typically runs $100 to $200 at Apple or an authorized provider. |
| Phone is 4 or more years old with multiple issues | Replacement usually delivers better value than a repair. |
| Any moisture exposure in the history | Repair cost escalates significantly; corrosion spreads. Replacement is usually cheaper. |
| Port was repaired but the problem returned | Underlying board damage. Replacement is the practical answer. |
The repair-vs-replace decision has more variables than just the port. For a full framework, including how to factor in age, software support, and total repair cost, see the Device Care pillar.
Repair vs Replace: When Fixing Tech Is Worth It
If the charging problem turns out to be a hardware failure that is not worth repairing, the most cost-effective next step is usually a used iPhone replacement, not a new one.
Replacing a Non-Charging iPhone with a Used One
When the repair math does not add up, a used replacement from a verified marketplace is the practical answer. On Swappa, used iPhones typically run 30 to 60% less than new, though prices vary by model, storage tier, and condition. You can check live prices before deciding whether repair or replacement makes more financial sense.
Every iPhone listed on Swappa goes through staff review. Listings must have a clean IMEI, no Activation Lock, no water damage, no cracked glass, and a fully functional battery. Sellers are required to disclose if battery health is below 80% and the Apple service message is showing, so you know what you are buying.
Buyers pay a flat 3% fee plus payment processing, lower than auction-site fees on comparable transactions. Payments go through PayPal with buyer protection built in. If a phone arrives not as described, you are entitled to a refund.
Browse current iPhone prices across models and storage tiers at swappa.com/buy/iphones to benchmark the replacement cost before you decide.
Used iPhone Buyer’s Guide: Every Generation Ranked (2026)
Frequently Asked Questions
Why is my iPhone not charging even with a new cable?
If a new Apple-certified cable does not fix it, check the charging port for compacted lint or debris. A toothpick and good lighting will often reveal dense material blocking the contacts. If the port is clear, do a force restart to rule out a software hang. Persistent charging failure after all three steps usually points to the battery or port hardware, which requires a repair or replacement decision.
Can lint really stop an iPhone from charging?
Yes. Lint from pockets and bags compacts inside the Lightning or USB-C port over months of use and can build up densely enough that the cable connector cannot reach the charging pins. It is one of the most common causes of iPhone charging failure, and cleaning the port costs nothing.
What does it mean when my iPhone charges slowly?
Slow charging most often means the power source is underpowered (a USB laptop port or a low-wattage adapter), a non-MFi cable is limiting the charge rate, or battery health has degraded enough to affect charging efficiency. Try a 20W or higher wall adapter with a certified cable first. If slow charging continues, check battery health in Settings.
How do I force restart an iPhone that will not respond?
On iPhone 8 and all later models: press and release Volume Up, press and release Volume Down, then press and hold the Side button until the Apple logo appears. On iPhone 7/7 Plus: hold Volume Down and Sleep/Wake together. On iPhone 6s and earlier: hold Home and Sleep/Wake together. A force restart does not erase any data.
My iPhone shows a charging icon but the battery percentage is not going up. What is wrong?
This usually points to a battery that cannot hold a meaningful charge, or a cable only providing enough current to keep the display on. Switch to a 20W or higher USB-C adapter and a certified cable. If the problem continues, check battery health in Settings > Battery > Battery Health and Charging. A reading below 80% with an Apple service message means battery replacement is due.
At what point should I replace the iPhone instead of repairing the charging port?
If the phone is four or more years old, has multiple issues beyond the charging problem, or the total repair cost is close to the phone’s current market value, replacement is usually the better financial move. Check current used iPhone prices at swappa.com/buy/iphones to benchmark the cost. Repair makes the most sense on a newer phone in otherwise good condition with one clear, fixable problem.
The Bottom Line
Most iPhone charging problems are not hardware failures. Work through the fixes in order: swap the cable, clean the Lightning or USB-C port, force restart. If none of those resolve it, check battery health and weigh the repair cost against the phone’s current value. When replacement makes more financial sense than a repair, used iPhones on Swappa give you a verified, staff-reviewed option at a significant discount to new.
