Introduction: Why it is important to know the charger settings for the Redmi Note 8 Pro
Xiaomi Redmi Note 8 Pro is still a popular choice among price-performance users, but even the most reliable device can run into problems if you use the wrong charger. One of the key parameters to look at is the current (ampers), which directly affects the charging speed and battery safety.
Many users mistakenly believe that power is the main thing (watts), forgetting that amperes and volts play an equally important role. For example, if you connect the Redmi Note 8 Pro to charging with insufficient current, the smartphone will charge slower, and in some cases may even overheat. On the other hand, too high current from uncertified RAM can reduce battery life or cause malfunctions in the power controller.
In this article, we will look at how many amperes the original charger for the Redmi Note 8 Pro produces, what alternatives can be used without risk to the device, and how to choose the right RAM if the original is lost or failed, and we will also touch on compatibility with Fast Charge technology and give recommendations for safe operation.
Original charger Redmi Note 8 Pro: specifications
Xiaomi Redmi Note 8 Pro comes with a MDY-11-EP (or similar, depending on the delivery region) charger, which supports Quick Charge 3.0 technology, but with some limitations specific to Xiaomi's budget models.
- 🔌 Input voltage: 100–240 V, 50/60 Hz (suitable for all countries)
- ⚡ Output voltage: 5V/9V/12V (automatic switching)
- 📊 Current strength: up to 2 A (amperes) at 5 V, 1.8 A at 9 V, 1.5 A at 12 V
- 💡 Maximum power: 18 W (real power depends on charging mode)
It is important to understand that 2 amperes is the maximum value that the unit can give at 5 V. In practice, the smartphone and the charger "agree" on the optimal parameters through the Quick Charge protocol. For example, when charging from 0 to 50%, 9 V / 1.8 A (16.2 W) mode can be used, and closer to 100% the current automatically decreases to 1 A to protect the battery.
The original RAM also comes with protection against overheating, short circuits and overcurrents, especially for the Redmi Note 8 Pro, as its 4,500mAh battery requires steady power, and using non-original units without such protection can cause the battery to bloat or even catch fire (in rare cases).
How to check the current strength of the charger yourself
If you doubt the characteristics of your charger (for example, bought a used smartphone without the original RAM), you can measure the current strength yourself.
- 🔧 USB-tester (e.g. models) UM24C or UM34C)
- 📱 Smartphone with support OTG (tester)
- 🔌 Correct. USB-cable (preferably original)
The verification algorithm:
- Connect. USB-tester between charger and cable.
- Insert the cable into the smartphone and start the charging process.
- The tester screen will display the current values of voltage (V) and current strength (A).
- Compare the data with the original parameters (see the table below).
If the current is significantly lower than the stated strength (for example, instead of 2 A you see 0.8 A), this may indicate:
- 🔋 Failure of charger;
- 🔌 Damaged. USB-cable (frequent problem!);
- 📉 Connector pollution USB-C smartphone.
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Before buying a new charger, check the cable! Often slow charging is due to a damaged wire, not the power supply.
| Parameter | Original Zoo | Permissible deviations | Critical values |
|---|---|---|---|
| Current (5 V) | 2 A | 1.8-2.2 A | <1.5 A or >2.5 A |
| Voltage (5 V) | 5 B ± 0.25 V | 4.75-5.25 | <4.5 B or >5.5 B |
| Max. Power. | 18 W. | 16-18 W | >20 W (risk of overheating) |
Compatibility with fast charging: what you need to know
The Xiaomi Redmi Note 8 Pro supports Quick Charge 3.0 technology, but with some nuances. Unlike flagship models (such as the Mi 10 or Black Shark), there is no full Qualcomm Quick Charge 4+ controller, so the maximum power is limited to 18 watts.
This means that:
- ✅ Chargers with Quick Charge 2.0/3.0 up-to-power 18 Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-Wh-W.
- ⚠️ Power supplies with Quick Charge 4.0+ or Power Delivery (PD) They will work, but will not increase the speed of charging.
- ❌ RAMs above 20 W (e.g. 30 W or 65 W) can cause overheating if they do not have protection against excess current.
Also, consider that the Redmi Note 8 Pro uses the MTK PE+ protocol (from MediaTek), which is optimized for the Helio G90T processor. This means that some Qualcomm chargers may not give maximum speed, even if they support Quick Charge 3.0.
Why does the smartphone warm up when charging?
What Chargers Can You Use Instead of the Original
If the original RAM is lost or broken, you don't have to buy the exact same unit, but the main thing is to follow the basic parameters: voltage 5 V, current at least 2 A, power up to 18 W. Here are the proven alternatives:
- 🔹 Chargers from other Xiaomi models: Redmi Note 9 Pro (18 watts, MDY-11-EQ) Poco X3 NFC (33 watts, but automatically limited to 18 watts) Mi 9 Lite (18 watts, MDY-08-EM)
- 🔹 Quick Charge 3.0: Anker PowerPort III Nano (18 watts) Baseus 18W PD (compatible QC 3.0) Belkin BoostCharge (18W certified)
- 🔹 Universal power supply: any RMS with output 5V/2A or 9V/2A (For example, from Samsung or Apple)
Important: Avoid cheap no-name chargers, especially those that promise “ultra-fast charging” in 30 minutes, which are often uncertified and can produce unstable voltages.
Check for certificates (CE, RoHS, FCC)|Make sure the maximum power is not more than 18 watts.|Select a block with Quick Charge 3.0 support or MTK PE+|Use an original or quality cable USB-C|Avoid RMS with damaged body or melted contacts-->
Frequent charging problems and their solutions
Redmi Note 8 Pro users often face the following charging problems:
- Slow charging (less than 1% per minute): 🔍 Check the cable - try another, original. 🔌 Clear the connector. USB-C dust-cotton. 📵 Reboot your smartphone or activate the aircraft mode.
- Charging is interrupted or not going: 🔋 Check whether the battery is swelling (if the case is deformed - urgently in the service!). 🔌 Try another charger. 📱 Reset settings through Settings → System system → Resetting settings (does not delete data).
- The smartphone warms up when charging: ❄️ Charge in a cool place, avoiding direct sunlight. 🎮 Do not play heavy games while charging. 🔋 If it warms up even when it is turned off, replace the battery.
If none of these methods worked, the problem could be the power controller on the motherboard, which would require a diagnosis at a service center, and the average cost of repairing the charging controller for the Redmi Note 8 Pro is between 1,500 and 3,000 rubles (depending on the region).
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If your smartphone stops charging after falling or getting moisture, DO NOT try to disassemble it yourself! 90% of the time, it causes plumes to damage or short circuit.
Myths about charging Redmi Note 8 Pro: what is true and what is not
There are many myths surrounding smartphone charging, and we will examine the most common ones in the context of the Redmi Note 8 Pro:
⚠️ Warning: Charging your smartphone up to 100% reduces battery life every time. Optimal range is 20% to 80%. Redmi Note 8 Pro can enable charging restriction via Settings → Battery → Battery mode (if available after update) MIUI).
- ❌ Myth 1: “The more powerful the charger, the faster the phone will charge." ✅ Reality: Charging speed is limited to the controller in the smartphone, not the power supply. For example, even if you plug in 65 watts of RAM, the Redmi Note 8 Pro will only take 18 watts.
- ❌ Myth 2: “You can only charge your smartphone with the original cable." ✅ Reality: The quality of the cable is important, not the originality of the cable, but the need to maintain currents up to 2 A and have reliable contacts.
- ❌ Myth 3: If you charge your phone at night, the battery will go bad." ✅ Reality: Modern smartphones (including the Redmi Note 8 Pro) automatically turn off power when they reach 100%, but prolonged exposure to high-temperature charging can reduce battery life.
Another common question is, "Can I use wireless charging?" The answer is no, because the Redmi Note 8 Pro doesn't support this technology, and trying to connect wireless RAM via an adapter can cause the power controller to overheat or damage.