Start with the simplest fixes first
Most phones that won't charge have a fixable problem: a blocked charging port, a damaged cable, or a phone that just needs a restart. Before you assume the battery or charging circuit is dead, try these steps in order. They take five minutes and solve the issue about half the time.
First, look directly into your phone's charging port with a flashlight. If you see lint, dust, or debris, use a wooden toothpick or a plastic phone cleaning tool — never metal — to gently scrape the sides and bottom of the port. Do this slowly and at an angle so you do not push debris deeper. Blow out any loose particles. Then plug in your charger and wait a few seconds to see if it recognizes the connection.
If that does not work, try a different charging cable. Cables fail more often than ports or batteries do. If you have a friend's cable that works with your phone model, borrow it for a test. If the phone charges with their cable, you have found your problem — buy a replacement cable from your phone's manufacturer or a certified third-party seller.
Key Takeaways
- Clean your charging port with a wooden toothpick or plastic tool before trying anything else, because lint buildup is the most common reason phones stop charging.
- Test with a different cable first, since cables fail more often than ports or batteries do.
- Restart your phone completely — turn it off, wait ten seconds, then turn it back on — because software can sometimes block charging recognition.
- If your phone charges slowly or only when powered off, the battery may be degraded but still usable; if it does not charge at all, the port, cable, or charging circuit likely needs replacement.
- Avoid third-party fast chargers and keep your phone cool while charging, because heat and high voltage both shorten battery life over time.
Restart your phone completely
Software glitches can prevent your phone from recognizing that a charger is connected, even though the hardware is fine. A full restart clears these glitches. Do not just lock the screen — actually power the phone off, wait ten seconds, then power it back on.
On an iPhone, hold the side button and either volume button until the power-off slider appears, then drag it to turn off the phone. On Android, press and hold the power button until a menu appears, then tap "Power off" or "Shut down." Wait ten seconds, then press the power button again to turn it back on. Once it restarts, plug in your charger and check whether it recognizes the connection.
Check whether the problem is the charger or the phone
If your phone still will not charge after cleaning the port and restarting, you need to know whether the charger itself is broken or whether something inside the phone is damaged. The fastest way is to borrow a charger you know works.
If you have access to another phone of the same model, plug your charger into that phone. If it charges the other phone normally, your charger is fine and the problem is inside your phone. If it does not charge the other phone either, your charger is broken and you need a replacement.
If you cannot test with another phone, try charging a different device with your charger — a tablet, smartwatch, or laptop — if your charger has the right connector. This tells you whether the charger produces power at all. If it charges other devices but not your phone, the problem is in your phone's charging port or circuit.
What to do if the charging port is damaged
A charging port can fail if the connector inside bends, breaks, or corrodes. Signs include the charger only working at certain angles, the phone charging very slowly, or the charger getting hot. If you see corrosion — a green or white crusty buildup inside the port — the port has been exposed to moisture.
You cannot repair a charging port yourself safely. The port is soldered to the phone's main circuit board, and attempting to fix it risks damaging other components. Your options are to have the port replaced by a repair shop or to replace the phone.
Before you pay for a repair, get a quote from at least two shops. Charging port replacement usually costs between $50 and $150 depending on your phone model and your location. If your phone is several years old or the repair costs more than half the price of a new phone, replacement may make more sense financially.
Understand what a degraded battery means
If your phone charges only when it is powered off, or charges very slowly even with the original charger, your battery may be degraded but the charging system is working. This is different from a phone that will not charge at all.
Batteries degrade naturally over time. After 500 to 1,000 full charge cycles — roughly one to three years of normal use — a lithium battery holds less charge than it did when new. A degraded battery can still charge, but it charges more slowly and drains faster. You can continue using the phone, but you will need to charge it more often.
If the battery is the only problem, you have two choices: live with more frequent charging, or have the battery replaced. Battery replacement costs $50 to $100 at most repair shops or through the phone manufacturer. This is usually cheaper than replacing the phone and extends its usable life by several years.
Avoid habits that damage batteries and chargers
Once you have your phone charging again, protect it from the same problems. Heat is the biggest enemy of batteries and charging circuits. Do not leave your phone in direct sunlight, in a hot car, or under a pillow while charging. If your phone feels warm to the touch during charging, unplug it and let it cool down.
Use only the charger that came with your phone or a certified replacement from the manufacturer. Third-party fast chargers push more voltage through the charging circuit than it was designed for, which degrades the battery and can damage the port. If you need a faster charge, use the original charger and plug it into a wall outlet rather than a computer USB port, which delivers less power.
Keep your charging port dry. If your phone gets wet, do not plug anything into it for at least 24 hours. Moisture inside the port causes corrosion, which eventually makes charging impossible. If your phone is regularly exposed to moisture — you work outdoors or near water — consider a phone with water resistance rated IP67 or higher when you upgrade.
When to replace your phone instead of repairing it
Not every charging problem is worth fixing. If your phone is more than five years old, the repair cost is more than half the price of a new phone, or the phone has other problems besides charging, replacement usually makes more sense than repair.
Before you buy a new phone, back up your data. On iPhone, use iCloud or connect to a computer and use Finder. On Android, use Google Account backup or Samsung SmartSwitch if you have a Samsung phone. Once your data is backed up, you can transfer it to a new phone without losing photos, contacts, or messages.
If you are keeping an old phone as a backup or for parts, you can still use it on WiFi even if it will not charge — just plug it in whenever you need it and keep it powered off most of the time. This extends the time before the battery degrades further.
Frequently Asked Questions
Why does my phone only charge when it is turned off?
When your phone is on, it uses power while the charger is trying to add power, which slows charging. If it charges only when off, your battery is likely degraded or your charger does not deliver enough power for the phone to charge while running. Try using the original charger and plugged into a wall outlet rather than a computer. If it still only charges when off, the battery should be replaced.
Can I use a charger from a different phone brand?
Only if it has the same connector type and the same or higher wattage rating. A USB-C charger from one brand often works with another brand's USB-C phone, but the wattage matters — a 5-watt charger will charge slowly compared to a 20-watt charger. Check your phone's manual for the recommended wattage. Never use a charger with a lower wattage than recommended.
Is it safe to use my phone while it is charging?
Yes, but it slows charging and generates heat, which degrades the battery faster. If you need to use your phone, unplug it and use it normally, then plug it back in when you are done. Avoid using it for demanding tasks like gaming or video recording while charging, because these create the most heat.
How do I know if my charger is broken or my phone is broken?
Test your charger on another device if you can — a tablet, laptop, or friend's phone with the same connector. If your charger works on another device but not your phone, your phone's charging port or circuit is damaged. If your charger does not work on any device, the charger is broken.
What does it mean if my charger gets hot?
A charger should be warm but not hot to the touch. If it is too hot to hold comfortably, unplug it when ready and stop using it. A charger that overheats may have an internal short circuit and could damage your phone or create a fire risk. Replace it with a new charger from the manufacturer.