Why the charging power of the Redmi Note 8 Pro raises so many questions
The Xiaomi Redmi Note 8 Pro, launched in 2019, is still one of the most popular budget devices in the aftermarket. Its 4,500mAh battery paired with a Mediatek Helio G90T processor requires a smart charging approach — especially if you want to extend battery life. But here, users are in for confusion: the kit comes with an 18W power supply, and the specs mention support for fast charging 33W.
The Redmi Note 8 Pro technically supports the MediaTek Pump Express 4.0 protocol, which theoretically allows you to charge at power up to 33W. However, in the box you will find only an 18-watt adapter - and this is not a coincidence.
- 🔌 What is the charger in the set and why exactly 18W
Spoiler: If you want to speed up charging to 27-30W without risking battery life, there are proven ways to do it — but they require you to follow a few key rules.
Original Charging: 18W or 33W?
In the box with the Redmi Note 8 Pro, you will find a standard white power supply from Xiaomi labeled MDY-11-ED (or similar).
- 🔌 Power: 18W (5V/3A, 9V/2A)
- 🔌 Protocol: Quick Charge 3.0 (backward compatibility with the QC 2.0)
- 🔌 Type of connector: USB Type-A (not Type-C!)
- 🔌 Cable: USB-A → USB-C, 1m long
Why not 33W? Two factors play a role here.
- The balance between speed and battery wear.The Mediatek Helio G90T warms up at high loads, and fast charging increases heat generation.The 18W is a trade-off where the battery lasts longer.
Interesting fact: if you connect the Redmi Note 8 Pro to the 33W-charging POCO F1 or Redmi K20 Pro, the smartphone will take the maximum 27W — And then only under certain conditions (these are discussed below). 33W The device will not pull due to restrictions in the firmware.
Can I use a charger more powerful than 18W?
Yes, but with reservations, the smartphone will automatically limit power consumption to a safe level, but there are nuances:
| Type of charging | Max. Power. | Charging time 0-100% | Risks. |
|---|---|---|---|
| The original 18W | 18W | ~2 hours 10 minutes | No. |
| 33W by POCO/Xiaomi | 27W (realistically) | ~1 hour 45 minutes | Overheating with active use |
| 65W/100W (USB-PD) | 18–22W | ~2 hours | No effect, possible overheating of the block |
| Wireless 10W | 10W | ~3 hours | Battery overheating during prolonged charging |
Important: If you decide to use 33W-When you use it actively (games, video calls), your smartphone can heat up to 45-50°C, which accelerates battery degradation, and the best scenario is to charge in airplane mode or with the screen off.
⚠️ Warning: Never use cheap unnamed charges higher in power 30W. They often do not meet the claimed characteristics and can give out unstable voltage, resulting in battery bloating or damage to the power controller.
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If your Redmi Note 8 Pro is warming up while charging, remove the case and put the smartphone on a flat surface (not on a pillow or blanket) and improve heat sink by 15-20%.
How to speed up charging without harming the battery
If you need to charge your smartphone faster but without risking battery life, follow these guidelines:
Use the original cable (or certified USB-C)
Turn on the plane mode or turn off mobile data
Charge at 10-35°C (not in the sun or in the cold)
Do not use your smartphone while charging (especially for gaming)
Turn off fast charging after 80% (if in a hurry, recharge later)-->
The most effective way is a combination 27W-charging + In this case, the charging time is reduced to 80% to 1 hour 10 minutes (versus 1 hour 40 minutes from the original). 18W). After 80%, the speed is automatically reduced to protect the battery.
Another life hack: if you use the Redmi Note 8 Pro with custom firmware (like Pixel Experience), you can turn on Force fast charge in the developer settings. This unlocks additional 2–3W power, but increases heat.
What happens if you charge 27W continuously?
Compatible with other protocols: Quick Charge, USB-PD, VOOC
The Redmi Note 8 Pro supports several fast charging standards, but not all of them are equally effective.
- ⚡ Quick Charge 3.0/4.0: operating at full capacity (18W). Charging from Samsung, OnePlus or Google with QC 3.0 fit.
- ⚡ USB Power Delivery (PD): limited 18W, even if the block supports 65W. The smartphone doesn't recognize PD mother-protocol.
- ❌ VOOC/Dash Charge (Oppo/OnePlus): These charges won't damage the device, but they'll run in standard charging mode (5W).
- ⚡ MediaTek Pump Express: theoretically supported, but in reality, the smartphone takes the maximum 27W.
The best choice for maximum speed is charging from other Xiaomi/POCO/Redmi devices with Quick Charge 3.0 support or MediaTek Pump Express.
- 🔌 POCO F1 (33W, MDY-12-ED)
- 🔌 Redmi K20 Pro (27W, MDY-10-ED)
- 🔌 Mi 9T Pro (27W, MDY-10-EJ)
⚠️ Note: If you use a charger from MacBook (USB-C PD), The smartphone will only take 15–18W, despite the power of the block in 30W/60W/96W. This is due to lack of support. PD Redmi Note 8 Pro.
Myths about charging Redmi Note 8 Pro: what is true and what is not
There are many myths surrounding the charging of this smartphone, and let's take a look at the most common ones.
- "Charging. 33W burns the power controller". ❌ The smartphone limits its power consumption, and the only risk is with substandard power supplies.
- "You need to discharge to 0% before charging". ❌ No, modern lithium polymer batteries don't have a memory effect. It's optimal to keep a charge in the range of 20 to 80%.
- "Wireless charging is safer for the battery". ⚠️ Partly true, but... Wireless charging heats the battery more than wired charging 18W. If you use it constantly, the battery life will decrease.
- "You can only charge with the original cable". ✅ It's true, but not exactly. The main thing is that the cable keeps the current up to the current. 3A And it had a high-quality flattening, and cheap cables can overheat.
Another popular question is, "Can I leave my smartphone on overnight charging?" Answer: Yes, but with reservations. Modern smartphones turn off power after 100%, but if the room temperature is above 30 ° C, it's better not to risk. In hot weather, use Settings → Battery → Optimize charging and set the limit to 80%.
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The most harmful scenario for the battery is charging 100% + heat + active use (such as playing while charging).
How to check the real charging power
If you’re in doubt about how much watt your Redmi Note 8 Pro takes, there are a few ways to check it out:
- The AccuBattery app (Android) shows the current charging power in real time. Install from Google Play and go to the Charging tab.
Example of calculation:
If AccuBattery shows up 9V × 2.5A, real-time — 22.5W (not 33W, This is a typical value for the Redmi Note 8 Pro with a 33W-charging.
If the power is below 15W when using the original unit, check:
- 🔌 Cable (possibly damaged overlay)
- 🔌 Connector. USB-C on a smartphone (pollution or oxidation)
- 🔌 Battery temperature (at >40°C power is automatically reduced)
What to do if the smartphone does not take charging
If the Redmi Note 8 Pro has stopped charging or is doing it too slowly, follow the algorithm:
Try another cable and power supply
Clean the USB-C connector of dust (use toothpick and alcohol)
Restart your smartphone in Safe Mode (hold the power button → Safe Mode)
Check the battery temperature in Settings → Battery
Update the firmware to the latest version MIUI-->
If nothing helps, the problem may be:
- 🔋 Power Controller (requires repairs)
- 🔋 Connector USB-C (frequently leaves the contact area)
- 🔋 Firmware (solved by flashing through Fastboot)
To check the power controller, connect your smartphone to your PC. If it's detected in Device Manager but it's not charging, it's a problem in the power chain. If it's not detected at all, it's faulty. USB-portage.
⚠️ Warning: If after falling or getting moisture, the smartphone stopped charging, do not connect it to charging until completely drying (minimum 48 hours in rice or silica gel!