Phone Not Charging? 12 Fixes That Actually Work
You plug in your phone and… nothing. No lightning bolt icon, no charging sound, no sign of life. Before you panic (or spend £200 on a repair you don't need), work through these 12 proven troubleshooting steps. They cover iPhone, Samsung, and every other Android device — from the dead-simple fixes that solve 80 % of cases to the advanced diagnostics that catch everything else.
Most charging problems are caused by one of three things: a faulty cable, a dirty charging port, or a software glitch. Hardware failure accounts for less than 15 % of “phone not charging” cases according to repair-shop data. That means the odds are heavily in your favour — keep reading.
Key Takeaways
- 80 % of charging issues are fixed by swapping the cable, cleaning the port, or restarting the phone.
- A wooden toothpick + compressed air is all you need to clean a charging port safely.
- “Charging stuck at 80 %” is usually Optimised Battery Charging — a feature, not a fault.
- If wireless charging works but wired doesn't, the problem is your port, cable, or adapter — not the battery.
- Battery health below 80 % means it's time for a replacement (£50–£89 at most repair shops).
Quick Diagnostic: Narrow It Down in 2 Minutes
Before diving into all 12 steps, answer these four yes/no questions. They'll immediately tell you where the problem lies — saving you time.
1Does the phone charge with a different cable?
Your original cable is faulty — replace it.
The cable is probably fine. Move to the next check.
2Does the phone charge with a different adapter?
Your power adapter has failed — get a new one.
The adapter is fine. The issue is elsewhere.
3Does the phone charge wirelessly?
The battery and software are fine — the problem is your port, cable, or adapter.
The issue may be software or battery-related. Continue troubleshooting.
4Does the phone charge in Safe Mode?
A third-party app is interfering. Uninstall recent apps.
The problem is hardware or system-level. Consider a factory reset or repair.
12 Proven Fixes for a Phone That Won't Charge
Work through these in order — they're arranged from quickest & easiest to more advanced. Most people find their answer within the first five steps.
Restart Your Phone
Easy~2 minA surprising number of charging problems are caused by temporary software glitches. A simple restart clears the RAM, terminates rogue background processes, and resets the USB controller — all of which can interfere with charging detection.
How to do it:
- Hold the power button (or power + volume down on newer iPhones) until the power-off slider appears.
- Slide to power off and wait 30 seconds.
- Press the power button to turn the phone back on.
- Plug in your charger and check whether charging resumes.
Pro tip: If a standard restart doesn't help, try a force restart: on iPhone 8+ press and quickly release Volume Up, then Volume Down, then hold the Side button. On Samsung, hold Power + Volume Down for 10 seconds.
Try a Different Cable
Easy~1 minCharging cables are the single most common point of failure. Internal wires fracture from repeated bending — especially near the connector ends — and the damage is often invisible from the outside. A cable can also lose its fast-charging capability while still trickle-charging at 2.5 W.
How to do it:
- Swap your current cable for a known-good one (ideally one that came in the box with another device).
- Make sure the replacement cable supports the same standard (USB-C to USB-C, USB-C to Lightning, etc.).
- Connect it to the same power adapter and wall socket.
- If the phone charges normally, the old cable was the problem — recycle it and get a certified replacement.
Pro tip: Look for cables with E-Marker chips (USB-C) or MFi certification (Lightning). These ensure proper power negotiation and prevent damage. Budget cables often lack these chips and silently limit charging to 5 V / 0.5 A.
Try a Different Power Adapter
Easy~1 minPower adapters contain capacitors that degrade over time, especially in warm environments. A failing adapter might still light up an LED but deliver unstable voltage that the phone's charging IC rejects. Using the wrong wattage adapter is another common issue — a 5 W adapter will charge an iPhone 15 Pro painfully slowly.
How to do it:
- Disconnect your cable from the current adapter.
- Plug it into a different USB power adapter — ideally one rated for at least 20 W.
- Also try a different wall socket to rule out a tripped breaker or faulty outlet.
- If the phone charges with the different adapter, replace the old one.
Pro tip: For fastest results, use a GaN charger rated at 30 W or higher. Modern GaN chargers are smaller, cooler, and more efficient than older silicon adapters. A single 65 W GaN charger can fast-charge your phone *and* your laptop.
Clean the Charging Port
Medium~10 minPocket lint, dust, and debris are the silent killer of charging ports. Material compacts at the bottom of the port over months, eventually preventing the connector from seating fully. This is the #1 repair-shop fix for "phone not charging" — and it's completely free to do at home.
How to do it:
- Power off your phone completely before cleaning.
- Shine a torch into the port to inspect for lint, fluff, or corrosion.
- Use a wooden or plastic toothpick (never metal) to gently scrape debris from the bottom and sides of the port.
- Follow up with a few short bursts of compressed air held at an angle.
- Reconnect the charger — you should feel the connector click in more firmly if debris was removed.
Pro tip: Avoid metal tools — they can short the charging pins or scratch the gold contact plating. A plastic SIM-eject tool or anti-static brush works well. If you see green or white corrosion, the port may need professional cleaning.
Check for Software Updates
Easy~5 minManufacturers regularly release updates that fix charging-related bugs. iOS 17.4, for example, resolved an issue where iPhones stopped charging above 80 % without Optimised Battery Charging being enabled. Android 14 QPR2 fixed a USB PD negotiation bug on Pixel devices. Running outdated firmware can leave known charging bugs unpatched.
How to do it:
- iPhone: Go to Settings → General → Software Update.
- Android: Go to Settings → System → Software Update (varies by manufacturer).
- Download and install any available update.
- After the restart, test charging again.
Disable Optimised / Adaptive Charging
Easy~1 minBoth iOS and Android have battery-health features that deliberately slow or pause charging to reduce wear. iPhone's "Optimised Battery Charging" may hold at 80 % overnight. Samsung's "Adaptive Charging" and Google's "Adaptive Charging" do similar things. These features can make it look like your phone has stopped charging when it's actually just waiting.
How to do it:
- iPhone: Settings → Battery → Battery Health & Charging → toggle off Optimised Battery Charging.
- Samsung: Settings → Battery → Charging settings → toggle off Adaptive charging.
- Pixel: Settings → Battery → Adaptive charging → toggle off.
- Charge your phone and observe whether it now charges past 80 %.
- Re-enable the feature afterwards — it genuinely extends battery lifespan.
Pro tip: If your phone consistently stops at 80 %, this is almost certainly the cause. It's a feature, not a fault. Re-enable it once you've confirmed charging works normally.
Boot into Safe Mode (Android) or DFU Mode (iPhone)
Advanced~5 minThird-party apps — especially battery "optimiser" apps, custom kernels, and rogue background services — can interfere with charging. Booting into Safe Mode (Android) disables all third-party apps, isolating the problem. On iPhone, DFU mode lets you restore the device firmware entirely.
How to do it:
- Android Safe Mode: hold the power button → long-press "Power Off" → tap "Safe Mode". Charge and observe.
- If the phone charges normally in Safe Mode, a third-party app is the culprit. Uninstall recently added apps one by one.
- iPhone DFU Mode (last resort): connect to a Mac/PC with iTunes/Finder, then force-restart while connected and follow the on-screen restore prompts.
- Warning: DFU restore erases all data. Back up first.
Check for Moisture or Liquid Damage
Medium~5 minModern phones detect moisture in the charging port and refuse to charge to prevent short circuits and corrosion. iPhone displays a "Liquid Detected" alert; Samsung shows a water-drop icon. Even high humidity or sweaty gym shorts can trigger this. Charging while wet can permanently damage the port's pins.
How to do it:
- If you see a moisture warning, do NOT attempt to charge — this can cause permanent damage.
- Gently tap the phone against your palm with the port facing down to dislodge water.
- Leave the phone in a dry, well-ventilated area for at least 4–6 hours. Avoid rice — it leaves starch residue.
- Use a wireless charger in the meantime if you need power urgently (Qi charging bypasses the port).
- If the warning persists after 24 hours with no moisture present, restart the phone to clear a stuck sensor.
Pro tip: A small USB-C port cover (costs about £2) prevents moisture ingress during workouts, beach trips, and rain. Prevention beats cure.
Reset Network and USB Settings
Medium~3 minCorrupted USB configuration data can prevent your phone from negotiating power delivery correctly. This is especially common after using Android Auto, Samsung DeX, or connecting to unfamiliar car infotainment systems that push incorrect USB profiles. Resetting these settings forces the phone to re-negotiate from scratch.
How to do it:
- iPhone: Settings → General → Transfer or Reset iPhone → Reset → Reset All Settings (this won't erase data but resets Wi-Fi passwords and display settings).
- Android: Settings → System → Reset options → Reset Wi-Fi, mobile & Bluetooth. On Samsung, also try Settings → General management → Reset → Reset network settings.
- After resetting, reconnect your charger.
- You'll need to re-enter Wi-Fi passwords afterwards.
Try Wireless Charging
Easy~1 minIf your phone supports Qi wireless charging (most phones from 2020 onwards), trying a wireless charger is a brilliant diagnostic step. If the phone charges wirelessly but not via cable, you've confirmed the issue is isolated to the port, cable, or adapter — not the battery or software.
How to do it:
- Remove any thick case or metal accessories that might block wireless charging.
- Place the phone centrally on a Qi wireless charger.
- Check for the charging indicator on screen.
- If wireless charging works, the issue is with your port, cable, or wired adapter.
Pro tip: MagSafe (iPhone 12+) and Qi2 chargers align magnetically for optimal charging speed. Standard Qi pads max out at 7.5–15 W, while MagSafe delivers up to 15 W consistently.
Check Battery Health
Easy~2 minLithium-ion batteries degrade over time. After 500 full charge cycles (roughly 18–24 months of typical use), capacity drops to around 80 %. A severely degraded battery may charge extremely slowly, show inaccurate percentages, or shut down unexpectedly. If your phone is over two years old, battery health should be one of the first things you check.
How to do it:
- iPhone: Settings → Battery → Battery Health & Charging. Below 80 % Maximum Capacity, Apple recommends replacement.
- Samsung: Settings → Battery → Battery information (or use Samsung Members app → diagnostics).
- Pixel: Settings → Battery → Battery health.
- If health is below 80 %, book a battery replacement. Apple charges £89, Samsung around £50–£80 depending on model.
Pro tip: Third-party apps like AccuBattery (Android) log charge cycles and estimate wear. Keep your phone between 20–80 % for daily use to maximise battery lifespan.
Inspect the Charging Port for Physical Damage
Advanced~5 minIf none of the above steps work, the charging port itself may be physically damaged. Bent pins, cracked solder joints, or a loose port housing are common after drops or years of plugging and unplugging. USB-C ports are more durable than old Micro-USB, but they're not indestructible.
How to do it:
- Using a bright torch, inspect the inside of the port for bent, broken, or discoloured pins.
- Gently wiggle the cable while plugged in — if charging cuts in and out, the port has a loose connection.
- Check whether the connector feels loose or wobbly compared to when the phone was new.
- If you find physical damage, do NOT attempt a DIY repair — take the phone to an authorised service centre.
- Port replacements typically cost £40–£80 at independent repair shops, or more through the manufacturer.
Pro tip: If your phone is under warranty or covered by AppleCare+ / Samsung Care+, the repair may be free. Always check your coverage before paying out of pocket.
⚠️ Danger Signs: When to Stop Charging Immediately
Most charging problems are harmless inconveniences. A few, however, signal a genuine safety risk. If you notice any of the following, stop charging immediately and take action.
Phone gets very hot while charging
Disconnect immediately. Could indicate a swollen battery or short circuit.
Burning smell from the port or adapter
Stop using both immediately. Replace the adapter and have the port inspected.
Battery visibly swollen (screen lifting from frame)
Do NOT charge. Take to a repair centre immediately — swollen batteries can catch fire.
Charging percentage jumps erratically (e.g. 20% → 60% → 5%)
Battery calibration issue or failing battery. Try a full discharge cycle, then replace if it persists.
Phone only charges at certain cable angles
Loose port connection. Needs professional repair.
Repeated "moisture detected" warnings in dry conditions
Port corrosion or stuck sensor. Clean the port; if warnings persist, have it inspected.
Why Is My Phone Charging So Slowly?
“Charging slowly” is different from “not charging at all” — and the causes are different too. If your phone is charging but takes forever, here are the most common culprits:
- Wrong adapter wattage. Using a 5 W adapter on a phone that supports 25 W+ fast charging means you're charging at 1/5th of the possible speed. Check our phone chargers guide to find the right wattage for your device.
- Cable without E-Marker chip. USB-C cables without an E-Marker chip are limited to 60 W (3 A) — fine for most phones, but cheap cables often cap at 5 V / 0.5 A. Browse certified USB cables for reliable options.
- Phone is too hot (or too cold). Lithium-ion batteries charge most efficiently between 20–25 °C. Above 35 °C, the phone throttles charging speed to prevent damage. Read our article on why fast chargers overheat for more detail.
- Screen-on usage while charging. Streaming video, gaming, or GPS navigation while charging consumes power faster than the charger can supply it — resulting in a net trickle charge.
- Charging from a laptop USB port. Most laptop USB-A ports output only 2.5 W. Even USB-C laptop ports may limit power to connected devices. Always use a wall adapter for fast charging.
Expected Charging Speeds by Standard (4,500 mAh Battery)
| Charging Standard | Wattage | 0–50 % | Full Charge |
|---|---|---|---|
| USB 2.0 (Basic) | 2.5 W | ~3–4 hours | ~6–8 hours |
| USB-A 5V/2.4A | 12 W | ~60–90 min | ~2.5–3 hours |
| USB PD 20W | 20 W | ~30 min | ~1.5–2 hours |
| USB PD 30W+ | 30 W | ~25 min | ~1–1.5 hours |
| Qi Wireless | 7.5–15 W | ~60–90 min | ~2.5–3.5 hours |
| MagSafe / Qi2 | 15 W | ~50–70 min | ~2–3 hours |
Times are approximate and vary by device. Use our Charging Speed Calculator for a personalised estimate.
When to Replace Your Charger (and What to Buy)
If your troubleshooting confirmed that the cable or adapter is the problem, it's time for a replacement. Here's what to look for in 2026:
For Phones Only (20–30 W)
- • USB-C PD (Power Delivery) or PPS support
- • GaN technology for compact size and less heat
- • Single-port is fine for most people
- • Price range: £12–£20
For Phone + Laptop (65–100 W)
- • Multi-port GaN with intelligent power distribution
- • USB-C PD 3.0+ with PPS for Samsung Super Fast Charging
- • 2–3 ports let you charge everything from one adapter
- • Price range: £25–£45
What About Cables?
Always pair a quality adapter with a quality cable. A £30 charger paired with a £1 cable will still charge slowly. Look for USB-IF certified cables with E-Marker chips for USB-C, or MFi-certified cables for Lightning. Our USB cables guide has our full recommendations.
Thinking about charging in the car? Our car charger guide covers the best options for vehicles. For international travel, see our travel charger recommendations.
iPhone-Specific Charging Fixes
iPhones have a few unique quirks when it comes to charging. If you own an iPhone and the general fixes above didn't help, try these:
- “This accessory may not be supported” — This usually means the cable isn't MFi-certified or the Lightning connector is dirty/damaged. Try a genuine Apple cable or a certified third-party one.
- iPhone 15+ not fast-charging via USB-C — Ensure you're using a USB-C to USB-C cable (not USB-A to USB-C) with a PD-capable adapter rated at 20 W+. See our iPhone charger guide for compatible options.
- Charging stops at 80 % — This is Optimised Battery Charging (see Fix #6 above). It learns your routine and completes the charge just before you normally unplug.
- Clean Charge feature (iOS 18.4+) — Apple's newer Clean Energy Charging may pause charging when your local grid is using high-carbon energy. Disable it in Settings → Battery → Battery Health & Charging if it causes issues.
Samsung & Android-Specific Charging Fixes
Android phones — especially Samsung Galaxy devices — have their own charging peculiarities:
- “Slow charging” notification on Samsung — This appears when the adapter doesn't support Samsung's Super Fast Charging (PPS protocol). You need a PD 3.0 charger with PPS at 25 W+ for Super Fast Charging, or 45 W for Super Fast Charging 2.0 on Galaxy S24 Ultra and similar flagships.
- Fast charging greyed out in settings — Restart the phone, then check Settings → Battery → Charging settings. If it's still greyed out, the adapter or cable doesn't support the required protocol.
- USB debugging or file transfer mode stuck — If your phone is set to “Transfer files” (MTP) mode via USB, some adapters may reduce charging power. Change the USB mode to “Charging only” in the notification shade when connected.
- Pixel “Adaptive Charging” — Google Pixels slow charging overnight to complete at your alarm time. This is normal behaviour. Disable in Settings → Battery → Adaptive charging if you need a quick top-up.
Need charger recommendations for your Samsung device? Browse our Samsung charger guide for models tested with Super Fast Charging.
5 Ways to Prevent Charging Problems
Prevention is always easier (and cheaper) than troubleshooting. Follow these habits to avoid charging problems in the first place:
Use certified cables
USB-IF certified (USB-C) or MFi certified (Lightning). Budget cables lack safety chips and degrade faster.
Keep the port clean
Blow out your port with compressed air once a month. A quick 10-second habit saves expensive repairs.
Avoid extreme temperatures
Don't charge in direct sunlight, in a hot car, or under a pillow. Ideal range: 15–30 °C.
Unplug gently
Pull the connector straight out — never at an angle. Angled removal is the #1 cause of port damage.
Replace cables annually
Even quality cables wear out. If you charge daily, replacing your cable once a year prevents problems.
Frequently Asked Questions
Why does my phone say "charging" but the percentage doesn't go up?
Can a bad charger damage my phone?
Why does my phone only charge when I hold the cable at a certain angle?
Is it safe to use my phone while it charges?
Should I let my phone battery drain to 0% before charging?
Why has my phone stopped fast charging?
Can wireless charging damage my phone's battery?
How do I know if my charging port needs replacing?
TL;DR — The Quick Fix Checklist
- 1. Restart your phone.
- 2. Try a different cable.
- 3. Try a different adapter.
- 4. Clean the charging port (wooden toothpick + compressed air).
- 5. Check for software updates.
- 6. Disable Optimised Battery Charging if stuck at 80 %.
- 7. If none of the above work → check battery health → consider professional repair.
Still stuck? Browse our full phone chargers collection for guaranteed-compatible replacements, or use the compatibility checker to match a charger to your exact phone model.
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Written by: SmartGear Outlet Research Team
Last updated: March 2026
Sources: Apple Support, Samsung Support, USB Implementers Forum, iFixit Repair Data 2025.