Quick answer: If your phone won't charge, the fault is almost always one of four things: the cable, the charging port, the battery, or the charging board (the small circuit that connects the port to the motherboard). You can usually tell which one it is in under five minutes using the tests below — before you spend money on the wrong part.
This guide covers every common charging symptom on iPhone and Samsung Galaxy devices, what each symptom actually means, and which replacement part fixes it. Every part linked below is one we stock and ship in the UK.
Why "phone not charging" has become a bigger issue since USB-C
Most new phones sold in the EU and UK now use USB-C rather than Lightning, following EU rules that require a common charging port on a wide range of portable electronics. That's mostly good news for repairability — USB-C ports and cables are more standardised — but it also means more people are mixing cables, chargers and phones from different brands than ever before, which makes cable-versus-port confusion more common, not less.
The practical effect for you: don't assume a charging fault is the phone's fault until you've ruled out the cable and the power source. Then work through the tests below in order.
The four things that can stop a phone charging
| Fault | Typical symptoms | How common | Typical part cost (GBP) |
|---|---|---|---|
| Cable or charger | Charges with one cable but not another; charges only at a specific charger | Very common | £3–£15 |
| Charging port | Charges only at an angle; loose connection; needs cable "wiggled"; visible lint or corrosion | Very common | £3–£31 depending on model |
| Battery | Phone charges but drains fast; shuts down at 20–30%; battery health warning; swelling | Common, increases with phone age | £10–£30+ |
| Charging board / motherboard damage | No charging at all, no response to any cable, sometimes after liquid exposure | Less common, usually liquid damage or drop damage | £3–£18 for the board itself; more if it's soldered to the motherboard |
Step-by-step: how to diagnose your charging fault
Work through these steps in order. Each one rules something out before you spend money.
- Try a different cable and a different wall adapter. This single test resolves more "not charging" cases than anything else. If the phone charges with a different cable, your original cable is faulty and you don't need any parts from this list.
- Clean the port. Turn the phone off, and use a wooden or plastic toothpick (never metal, and never anything conductive) to gently remove lint or debris from the port. Pocket lint is one of the most common causes of "loose connection" charging faults, especially on phones carried without a case.
- Check whether it charges at an angle. If the phone only charges when you hold the cable at a specific angle or apply pressure, the port's internal contacts are worn or the flex cable is failing. This points to a port replacement, not a battery or board issue.
- Check wireless charging. If wireless charging works but wired charging doesn't, the fault is isolated to the port or cable — the battery and main charging circuitry are fine. If wired charging works but wireless doesn't, the wireless charging coil may need replacing.
- Check the battery health reading. On iPhone, go to Settings → Battery → Battery Health & Charging. On Samsung Galaxy, go to Settings → Battery and device care → Battery → View details. A battery that's charging fine but draining unusually fast, or one flagged as needing service, points to a battery replacement rather than a port problem.
- Check for complete unresponsiveness. If the phone shows absolutely no response — no charging animation, no warmth near the port, nothing — with multiple known-good cables and chargers, this suggests either a failed charging board or, in more serious cases, liquid or impact damage to the motherboard. This is the one case where DIY part-swapping has diminishing returns and a professional diagnostic is worth paying for.
Symptom: charges only at an angle, or needs the cable "wiggled"
This is a worn or damaged charging port, and it's one of the most common repairable faults we see. The port's internal metal contacts wear down with thousands of insert-and-remove cycles, and the flex cable behind the port can crack from repeated bending, especially on phones that are dropped.
The fix is a full charging port flex cable replacement, not just the visible port. On iPhone this is a small flex assembly; on many Samsung Galaxy A-series phones it's a charging port board that also handles headphone jack and microphone functions on some models, so a failing port can sometimes cause microphone issues too.
iPhone charging port parts we stock:
- iPhone 16 Pro Max charging port flex cable — from £10.99
- iPhone 16 Pro charging port flex cable — from £20.99
- iPhone 16 charging port flex cable — from £14.99
- iPhone 15 Pro Max charging port flex cable — from £30.99
- iPhone 15 Pro charging port flex cable — from £24.99
- iPhone 15 charging port flex cable — from £12.99
- iPhone 12 / 12 Pro charging port flex — from £5.99
- iPhone 11 charging port flex with microphone — from £8.99
Not your model listed above? Browse the full range in our iPhone 11 parts and iPhone 12 parts collections.
Samsung Galaxy charging port parts we stock:
- Samsung Galaxy S24 Ultra charging port board — from £16.99
- Samsung Galaxy A03s charging port — from £5.99
- Samsung Galaxy A02s charging port board — from £3.99
- Samsung Galaxy A02 charging port board (with headphone jack) — from £5.99
- Samsung Galaxy A01 charging port board — from £4.99
Symptom: won't charge at all, with any cable
Start by confirming this isn't a cable or wall-adapter problem — test with at least two different cables and two different power sources (a wall plug and a laptop USB port, for example). If it's genuinely dead with everything you try:
- No warmth, no charging animation, completely silent: this usually means the charging board isn't passing power through to the battery at all. This is a charging port/board replacement in most cases.
- Recently dropped or exposed to liquid: the flex cable connector may have detached from the motherboard, or there may be corrosion on the connector pins. A charging port replacement often resolves this, but if the phone was submerged, the fault may sit on the motherboard itself, which is a more involved repair.
- Phone gets warm near the port but still won't charge: this points more towards a battery fault than a port fault. A battery that has swollen or degraded significantly can prevent charging as a safety measure.
Symptom: charges, but drains unusually fast or shuts down early
If the phone accepts a charge normally but the battery percentage drops fast, or the phone shuts off unexpectedly at 20–30% remaining, this is a battery health issue rather than a charging-path issue. Batteries degrade with every charge cycle, and by around 500 charge cycles most phone batteries have noticeably reduced capacity compared to new.
Batteries and battery-adjacent parts we stock:
- Samsung Galaxy S24 replacement battery — from £10.34
- Battery adhesive strips for iPhone battery installation — from £1.99
If you can't find your exact model's battery listed, search your model on the site or get in touch — we add new model batteries regularly as devices come out of warranty in bulk.
Symptom: wireless charging doesn't work, but the cable does
This isolates the fault to the wireless charging coil, a small copper coil positioned behind the back glass (on iPhone, it's usually combined with the NFC antenna). Wired charging uses a completely separate circuit, so a coil fault won't affect cable charging at all — that's actually the easiest way to confirm the diagnosis.
- iPhone 15 Pro Max NFC wireless charging coil + flashlight flex cable — from £12.99
- Samsung Galaxy S22 Plus wireless charging chip — from £6.99
- Samsung Galaxy S9 Plus Qi wireless charging coil — from £2.49
- Samsung Galaxy S8 Qi wireless charging coil — from £2.99
What grade of replacement part should you buy?
Charging port flex cables and batteries aren't sold as a single standard product — quality and price vary by grade, and it affects both fit and long-term reliability:
- Original/OEM-pull parts are removed from genuine donor devices. They match factory tolerances exactly, which matters most for charging ports since a loose-fitting connector reintroduces the exact "charges at an angle" fault you're trying to fix.
- Premium aftermarket parts are newly manufactured to match original specifications. Quality varies by manufacturer, so check the specific listing for testing and warranty information rather than assuming all aftermarket parts perform the same.
- Budget aftermarket parts are the cheapest option and can work perfectly well for basic charging function, but are more likely to have looser tolerances or slightly different connector shielding, which can occasionally trigger "accessory not supported" style warnings on some phones.
For charging ports specifically, we'd lean towards original or premium aftermarket over budget, simply because a poorly-fitting port replacement can leave you back where you started within a few months. For batteries, check the listed capacity in mAh against your phone's original spec, and don't buy a battery without adhesive strips included or available separately — reusing old adhesive is a common cause of a battery working loose after fitting.
Frequently asked questions
How do I know if it's the cable or the port?
Test with a second, known-good cable on the same phone. If it charges normally, the original cable was faulty. If it still doesn't charge, or only charges intermittently, the port or its flex cable is the more likely cause.
Can I fix a charging port myself?
On most phones, yes — a charging port flex replacement is one of the more straightforward repairs, comparable in difficulty to a battery swap. It typically involves removing the back cover or screen assembly, disconnecting the old flex cable, and fitting the new one. If you're not confident opening the device, a local repair shop can usually fit the part in under an hour.
Why does my phone charge slowly all of a sudden?
Slow charging usually points to one of three things: a degraded battery that can no longer accept a fast charge safely, a worn charging port not making full contact, or a cable/adapter that doesn't support the wattage your phone expects. Rule out the cable and adapter first, since that's the cheapest and quickest check.
Is it safe to keep using a phone that charges only at an angle?
It's usually safe short-term, but a port with worn contacts can generate excess heat at the connection point, and the constant strain of holding the cable at an angle accelerates further damage to the flex cable and sometimes the connector on the motherboard side. It's worth replacing before it fails completely, particularly if you rely on the phone daily.
Does a battery replacement fix a phone that won't charge at all?
Only if the battery itself is the fault — for example, if it's swollen or has failed completely. If the phone shows no response whatsoever to charging (no warmth, no animation, no logo flash), a battery replacement on its own often won't fix it, because the fault is more likely in the charging port or board that delivers power to the battery in the first place. Diagnose using the steps above before buying a battery.
Will a third-party charging port affect my phone's warranty or performance?
If your phone is still under manufacturer warranty, opening it to replace a part will typically void that warranty — check your specific terms first. In terms of performance, a correctly fitted, quality replacement port restores normal charging function. We recommend checking reviews and part grade (genuine, refurbished original, or aftermarket) before buying, since quality varies significantly between suppliers.
When to get a professional diagnosis instead
Self-diagnosis using the steps above works well for the majority of charging faults. Get a professional opinion instead of guessing if:
- The phone has been submerged in liquid and shows no response at all
- You've already replaced the port and the fault persists
- The battery is visibly swollen (do not attempt to charge or puncture a swollen battery)
- The phone shows charging animation but the percentage never increases, which can indicate a motherboard-level power management fault rather than a simple part failure
In these cases, a repair shop can run a proper load test on the charging circuit to confirm exactly where the fault sits before you spend money on parts.
Summary: matching the symptom to the part
If you take one thing from this guide: test with a different cable first, always. After that, "charges at an angle" means a port fault, "drains fast but charges fine" means a battery fault, "wireless works but wired doesn't" (or vice versa) tells you exactly which circuit has failed, and "no response at all with multiple cables" is the one case worth a professional opinion before you buy parts.