iPhone Not Charging: Causes and How to Fix It

If your iPhone won't charge, start with the basics in this order: clean out the charging port, swap in a known-good cable and adapter, then force restart the phone — that combination resolves the large majority of cases. If the phone still won't take a charge, the cause is usually one of four things: a wireless or MagSafe alignment problem, a software glitch left over from an iOS update, a liquid-detection alert blocking the port, or a battery that has aged to the point where it needs service. This guide walks through each cause with Apple's own fixes, including the charging quirks — like an iPhone that stalls at 80 percent — that are actually normal behavior and not a fault at all.

Quick fixes at a glance

Before digging into any single cause, it helps to match your symptom to the likely fix. This table covers the most common versions of "iPhone not charging" searches, based on Apple's own troubleshooting documentation.

Check your cable, adapter, and charging port for debris

The single most common reason an iPhone won't charge is also the simplest to fix: something physical is wrong with the connection. Apple's own support guidance for a device that won't charge starts with inspecting the charging cable and USB power adapter for visible damage — breakage, fraying, or bent prongs — and avoiding any accessory that looks damaged. Try a wall outlet instead of a computer or USB hub, and confirm the cable is firmly seated at both ends.

Pocket lint, dust, and sand build up in the charging port over time and can physically block the pins from making contact. Apple's battery, charging, and power troubleshooting guide recommends gently cleaning the port with a dry, soft-bristled brush rather than anything metal, and explicitly warns against using bleach, hydrogen peroxide, compressed air, or submerging the iPhone to clean it. Once the port is clear, plug the cable back in firmly and let the phone charge for at least 30 minutes before concluding anything else is wrong — a fully depleted battery can take a little while to respond.

iPhone not charging when plugged in: try a force restart

If your iPhone shows no response at all — no charging symbol, no sound, a completely black screen — even after you've confirmed the cable, adapter, and outlet are good, Apple's next recommended step is a force restart. On an iPhone 8 or later, press and quickly release the volume up button, then quickly release the volume down button, then press and hold the side button until the Apple logo appears. This doesn't erase anything; it simply resets the hardware and can clear a frozen state that's preventing the charging circuit from engaging. After the restart, give it another 30 minutes on the charger to see whether it starts responding.

If the phone still won't power on or charge after a force restart, Apple's guidance is direct: it's time to bring the iPhone, cable, and adapter to an Apple Store or Apple Authorized Service Provider for diagnosis, since this usually points to a hardware fault rather than something fixable at home.

iPhone not charging wirelessly or on MagSafe

Wireless and MagSafe charging fail for different reasons than cable charging, mostly related to alignment, power, and interference. According to Apple's MagSafe Charger setup instructions, it should sit face up on a flat surface clear of metal objects, with the iPhone centered on top of it so the coils line up — off-center placement is one of the most common reasons charging never starts. A thick case, a case with magnetic accessories attached, or a credit card wedged behind the phone can all block the connection.

Power matters too. Apple recommends connecting a MagSafe Charger to at least a 20W USB-C power adapter (30W or greater is recommended for full-speed charging up to 25W on supported iPhones); an older or weaker adapter, or a low-power USB port on a computer, can result in very slow or no charging at all. One detail that surprises a lot of people: if your iPhone is connected to a MagSafe Charger and a cable at the same time, it charges through the cable, not MagSafe — so an iPhone sitting on a MagSafe puck while also plugged in isn't actually drawing wireless power.

If you've ruled out alignment, case interference, and adapter wattage, try a different Qi-certified pad or MagSafe accessory to isolate whether the charger itself has failed — a worn or damaged pad is a common culprit once the basics check out.

Software glitches after an iOS update

Occasionally an iPhone will show a charging percentage that doesn't move, a charging icon that flickers, or a battery indicator that seems stuck right after installing a new version of iOS. This is usually a temporary software state rather than a hardware problem, and a force restart (see above) resolves most of these cases by resetting the processes that manage the charging display. If the issue persists, check Settings > General > Software Update for a follow-up patch — Apple regularly ships point releases that fix exactly this kind of post-update bug, and our walkthrough of the iOS 27.0.1 update covers what one recent patch addressed if you want to see the pattern.

If charging behavior changed right after you updated and a further software update doesn't fix it, treat it the same as any other charging fault: clean the port, try another cable, and force restart before assuming the update itself damaged anything — it's very rarely the actual cause.

Battery health and why charging slows down

A battery that has aged can charge more slowly, stop short of 100 percent, or drain unusually fast even while plugged in. You can check this yourself in Settings > Battery > Battery Health & Charging, which shows maximum capacity as a percentage of the battery's original capacity when new. Apple's troubleshooting documentation also flags that a non-genuine or unknown battery — often the result of a low-cost third-party replacement — can trigger false MagSafe failures, unexpected shutdowns, or charging that won't progress past a low percentage, and that Apple's own diagnostics can confirm whether a battery is flagged as unknown.

It's also worth knowing that seeing 99 percent instead of 100 percent on a battery that otherwise seems full doesn't by itself indicate a battery or hardware problem — iPhone's battery percentage display can round slightly without anything being wrong. If Battery Health reports significantly reduced capacity alongside real charging symptoms, battery service is the appropriate next step rather than more troubleshooting.

iPhone not charging past 80%: Optimized Battery Charging and Charge Limit

If your iPhone consistently stops at 80 percent overnight, that's very likely intentional, not a malfunction. Optimized Battery Charging uses on-device machine learning to learn your daily routine and delays charging past 80 percent until shortly before you'd normally unplug, reducing the time the battery spends fully charged — a known contributor to long-term battery wear. It's on by default and needs about two weeks and several long charging sessions in one place to start learning your pattern.

On iPhone 15 and later, Apple also offers a dedicated Charge Limit slider under Settings > Battery > Charging, letting you cap charging anywhere from 80 to 100 percent in 5 percent steps; set it to 100 percent to get Optimized Battery Charging's smart delay instead of a hard cap. On iPhone 14 and earlier, Optimized Battery Charging is a simple on/off toggle under Settings > Battery > Battery Health & Charging. Separately, fast charging itself can pause around 80 percent to let the battery cool down before resuming at a slower rate, and if the battery is too warm, software may temporarily limit charging above 80 percent until it cools — both are protective behaviors, not faults.

Liquid detected or water damage

iPhone (XS, XR, and later) can detect moisture in the Lightning or USB-C connector and will block charging to protect the pins from corrosion. You'll typically see an alert like "Charging Not Available" for a wired Lightning connection, or "Liquid Detected in USB-C Connector" on newer USB-C iPhones. Apple's guidance is to unplug the cable immediately, avoid charging until the alert clears, and let the port air-dry — gently tap the iPhone against your hand with the port facing down to help any trapped liquid drain, and leave it in a dry, ventilated spot. Avoid compressed air, external heat sources, or inserting anything into the port to dry it out faster, since all of these can push moisture deeper in or damage the connector.

While the alert is active, a Qi-certified wireless charger is a safe workaround as long as the back of the iPhone itself is dry. If the alert won't clear after several hours or keeps reappearing with no obvious moisture source, that's a sign to get it checked rather than keep forcing a cable connection — and worth noting that liquid damage isn't covered under Apple's standard one-year limited warranty, so prevention (cases, avoiding charging near water) is cheaper than the fix.

Third-party chargers and cables

Not every third-party cable or adapter is built to the same spec, and a mismatched or uncertified accessory is a frequent, overlooked cause of "won't charge" or "charges painfully slowly." Apple's guidance on USB power adapters is to use a cable and power adapter that meet its published power requirements for your iPhone model — generally 20W or higher for fast charging — and to watch for telltale signs of a bad accessory: a cable that only charges at a certain angle, a connector that feels loose, or an adapter that gets hot to the touch. If you've already ruled out port debris and software, swapping to an Apple cable and adapter (or a known-good MFi-certified equivalent) is a quick way to isolate whether the accessory itself is the problem before assuming the iPhone needs service.

When to get Apple service

Work through the steps above in order — cable and port, force restart, wireless alignment, software update, liquid check, battery health — and most charging problems resolve without a store visit. Apple's own documentation is consistent on when to stop troubleshooting at home: if the iPhone still won't power on or charge after a force restart with a known-good cable and adapter, or if Battery Health flags a genuinely degraded or unknown battery, it's time to bring the iPhone, cable, and adapter to an Apple Store or Apple Authorized Service Provider for a proper diagnosis. Trying to force a charge on a device with a confirmed liquid-detection alert or a swelling battery isn't worth the risk to the hardware.

If you're also weighing whether it's worth repairing an older handset versus moving on, it can help to see how current models compare — our breakdown of the iPhone 18 Pro against the iPhone 17 Pro covers what's actually changed hardware-wise, including charging speed, if a replacement ends up being the more practical route after service.

What to do next

If your iPhone still isn't charging after cleaning the port, trying another cable, force restarting, and checking for a liquid-detection alert, the remaining likely causes are a worn battery or a hardware fault that needs a technician. Check Battery Health first since that's self-diagnosable in under a minute, then book a Genius Bar appointment or contact Apple Support if the problem continues. And if the fix turns out to be "this iPhone needs a new battery or a replacement," it's worth reading up on moving your data to a new iPhone so the transition is painless whenever that day comes.

Written byNadia Osei

Nadia Osei covers mobile and consumer gadgets for Pandromeda: smartphones, tablets, smartwatches, earbuds and smart-home devices. She tracks launches, software updates and pricing across Apple, Google, Samsung and the rest, and builds comparisons from the manufacturers' published specifications.

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