Is your charger fast?
See your charger's power in watts, whether fast charging is on, a live charging graph and how long a full charge takes.
Choose a test
For an accurate result
- Battery between 20% and 70%
- Brightness low, don't use the phone
- Keep this page open until the end
- Plug in the charger and cable you want to test
🔌 Plug in your charger
The test starts by itself when charging begins.
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0:00
Measuring…
Don't unplug. Keep this page open.
Your browser can't read the battery (iPhone or desktop). Use the 5-minute manual test.
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Your tests on this phone
How the charger speed test works
- Pick your phone. We know its battery size and maximum charging speed from our database of 595 phones.
- Plug in and start. We time exactly how fast your battery % goes up.
- Get your result: charger power in watts, fast charging ON or OFF, a score out of 100 and how long a full charge takes.
- Compare with what an original charger normally gives your phone, then test another charger or cable.
Three tests in one
Charger power, fast charging check and score. Best for checking a new or old charger.
Live charging graph, peak and average power, and a warning if charging pauses because of heat, a loose cable or a weak charger.
Keeps the processor busy like a heavy game and checks if the charger still adds battery while you play.
What is a normal result for an original charger?
Phones never take a charger's full rated power for long, so an original charger tests below the number on its label. Use this table to judge your result.
| Phone supports | Original charger normally tests | Likely fake or weak below |
|---|---|---|
| 10W | 8–10W | 5W |
| 15W | 11–15W | 6W |
| 18W | 14–18W | 8W |
| 25W | 18–23W | 10W |
| 33W | 19–25W | 11W |
| 45W | 26–34W | 15W |
| 67W | 32–42W | 18W |
| 120W | 58–76W | 33W |
Battery between 20% and 70%, screen on, phone not in use. Results are estimates.
Charging speed by phone brand
Maximum charging speeds of the 595 phones in the Chargero phone database.
| Brand | Phones | Most common | Fastest |
|---|---|---|---|
| OPPO / Realme / OnePlus | 122 | 67W | 120W |
| Samsung | 114 | 25W | 60W |
| Xiaomi / Redmi / POCO | 73 | 67W | 120W |
| Infinix | 60 | 10W | 120W |
| Tecno | 47 | 18W | 70W |
| Apple (iPhone) | 46 | 20W | 60W |
| Vivo | 39 | 90W | 90W |
| Google Pixel | 25 | 30W | 45W |
| Honor | 20 | 35W | 100W |
| Motorola | 12 | 68W | 68W |
Test your phone's charger
Tap a phone to start its test, or open its full charger guide.
How to spot a fake charger
- Low test result. Far below the normal range above, or fast charging shows OFF on a charger sold as "fast".
- Too light. Fake chargers often feel much lighter than the original.
- Bad label. Blurry print, spelling mistakes or missing output details like 9V⁓2.77A. Check it with our Charger Label Decoder.
- Gets very hot within a few minutes of charging.
- Price too good to be true for a branded fast charger.
Why is my phone charging slowly?
- Weak or damaged cable. Run this test with another cable. Cables are the most common cause.
- Wrong charger type. The charger doesn't support your phone's fast charging. Check with the Charger Compatibility Checker.
- Heat or heavy use. Phones slow charging when hot or busy. Try the gaming test to see how your charger copes.
- Battery above 80%. Charging slows down on purpose near full.
- Dirty charging port. Dust stops the cable from sitting fully.
More help: Slow Charging Troubleshooter · Charging Time Calculator · Charger Finder
Questions
How does the charger speed test work?
Plug in your charger and start the test. For 3 minutes we time exactly how fast your battery percentage goes up. From your phone's battery size we work out how much power reaches the battery, add the power the screen and phone use while charging, and show the charger's power in watts, whether fast charging is on and how long a full charge will take.
Why does my 25W charger show less than 25W?
25W is the charger's maximum. Phones take full power only in short bursts at low battery, and slow down when warm, when the screen is on or above about 70%. That is normal and protects your battery. An original 25W charger usually tests around 17–23W here. Compare your result with the "Normal for original charger" value.
Can it show volts and amps?
No website can read volts and amps. A browser can only see the battery percentage, so we work out the charger's power from how fast the battery fills. For exact volts and amps you need a USB power meter. We never show numbers we cannot measure.
How accurate is the test?
It is an estimate, usually within about 10%. For the best result, test at 20–70% battery, keep the brightness low, keep this page open and don't use the phone during the test.
What does "Fast charging ON" mean?
It means your charger and phone are using a fast charging mode, such as USB Power Delivery, PPS (Samsung Super Fast Charging) or the phone brand's own fast charging. If it shows OFF, your phone is charging at a basic 5–10W speed.
What is the gaming test?
The gaming test keeps your phone's processor busy for 3 minutes, like a heavy game such as PUBG, and checks whether the charger still adds battery. A weak or fake charger often cannot keep up, so the battery stays the same or goes down.
What is the full test?
The full test keeps going until your battery reaches 80% or 100%. It draws a live charging graph, finds the peak and average power and warns you if charging pauses, which can mean heat, a loose cable or a weak charger.
Can I test a power bank, car charger or cable?
Yes. Plug your phone into the power bank, car charger or cable you want to check and run the same test. Change one thing at a time, for example the same charger with two cables, to find the weak part.
Does it work on iPhone?
iPhones don't let websites read the battery, so you get a 5-minute manual test: note the battery %, wait 5 minutes, then enter the new %.
My result is low. Is my charger fake?
A very low result often means a fake, damaged or weak charger, or a cable that can't carry fast charging. Test again with another cable first. If it is still slow, see the right charger for your phone.
Is it free and safe?
Yes. There is no sign-up, nothing is installed and no data leaves your phone. The gaming test only keeps the processor busy for 3 minutes, so the phone may get a little warm.
Phone data: 595 phones · Updated November 2026 · Made by Chargero, Lahore