It's a familiar situation for many people: you go away for the weekend, you take the Xiaomi Redmi Note 8 Pro with you, and you forget to charge at home, or it suddenly breaks at the wrong time, the battery is running out, and only at hand. USB-Spoiler: ways to charge a smartphone without the original power adapter at least seven, and most of them do not require special skills.
In this article, we will look at all the working methods, from the classic (via Power Bank or other phone) to exotic (using a solar panel or a car lighter), focusing on safety: which ways can damage the battery of the Redmi Note 8 Pro and which can not, and learn how to speed up charging in critical situations and what to do if the smartphone does not respond to the connection at all.
Important: Redmi Note 8 Pro supports Quick Charge 3.0 (18W) fast charging technology, but not all alternative methods will provide the same speed. USB-The port of a laptop can take 5 to 6 hours, and we'll tell you where the speed loss is minimal and where you have to sacrifice time for convenience.
1. Charging through USB-port
The most affordable way if you have a USB-Type-C cable and any computer at hand. Redmi Note 8 Pro is compatible with most modern devices. USB-Ports, but there are nuances:
✅ Pluses:
- 🔌 No additional devices are needed, only cable.
- 💻 It works even on older PCs. USB 2.0 (albeit slowly).
- 🔋 You can transfer files simultaneously.
❌ Cons:
- 🐢 Charging speeds are 3-5 times lower than the original adapter (0.5-1 A instead of 2-3 A).
- 🖥️ Some laptops are turning off power USB-sleep-port.
How to speed up charging through USB?
- Use the port. USB 3.0 (usually blue) – it gives more current.
- Turn off data transfer: when connecting, select the "Charge Only" mode.
- Close the resource-intensive programs on the PC – they can limit the current supply.
⚠️ Note: If the laptop is discharged to 10% or less, it can automatically reduce power USB-In this case, the charging of the Redmi Note 8 Pro will be extremely slow or interrupted.
Connect the cable to the port USB 3.0 (blue)
Select the "Only Charging" mode on the phone
Close the background applications on PC
Disconnect the laptop from the network (if it is on the battery) – this will increase the current on the battery. USB
-->
2.Use of Power Bank (external battery)
Power Bank is a universal solution for those who often forget to charge. For the Redmi Note 8 Pro, any external battery with a USB-Type-C output will suit. USB-A (But not all power banks are equally useful:
🔍 What to look for when choosing Power Bank for Redmi Note 8 Pro:
| Parameter | Recommendation | Why is it important? |
|---|---|---|
| Capacity | 10,000 to 20,000 mAh | Less is enough for 1-2 full charges, more is hard to carry |
| Exit power | 18 watts (Quick Charge 3.0) | Provides maximum charging speed, as from the native adapter |
| Type of connector | USB-Type-C | Avoid adapters - they reduce the current |
| Brand | Xiaomi, Baseus, Anker | Cheap No-Name Models Could Damage Battery |
💡 Lifehack: If your Power Bank supports two-way charging (in/out via Type-C), you can charge it and your smartphone simultaneously from the same cable, for example, connect a power bank to a laptop, and the Redmi Note 8 Pro to a power bank.
⚠️ Warning: Do not use Power Bank if it is swollen, warm or smells of burning. These are signs of malfunctioning lithium-ion cells that can lead to fire.
💡
If the Power Bank is discharged and you need to charge it urgently, hold it for 10-15 minutes in the sun (if it is black), and heat will accelerate the chemical reactions in the battery, and it will give off a little extra current.
3. Charging from another smartphone (by cable or wireless)
If there is another phone with a chargeback feature nearby (like the Samsung Galaxy with Wireless PowerShare or Huawei with Reverse Charging), you can "share" power. Redmi Note 8 Pro does not support wireless charging, but there are workarounds:
🔄 Method 1: Reverse charging wired (OTG)
📶 Method 2: Wireless charging (if there is an adapter)
- 🪄 Need: wireless charging pad and Qi-receiver for Redmi Note 8 Pro (buyed separately).
- ⚡ Speed: 5–7.5 W (slower wired, but better than nothing).
- 💰 Cost of a Qi receiver: ~500–1000 rubles.
❗ Important: Not all smartphones can give off charge. for example, the iPhone does not support reverse charging over the cable, and Xiaomi has this feature only in flagship models (for example, the Mi 11 Ultra).
What smartphones can charge the Redmi Note 8 Pro?
4. Charging from a car lighter
If you're on the road and charging is at zero, the car adapter will be a lifesaver.Redmi Note 8 Pro is compatible with most autocharging, but there are nuances:
🚗 How to choose an adapter for a lighter:
- 🔌 Power: minimum 12W (optimum 18W for Quick Charge).
- 🔗 Connector: USB-Type-C or USB-A (Type-C cable).
- 🛡️ Protection: look for models with protection against overheating and surges of voltage.
⚡ Step-by-step instruction:
- Put the adapter in the lighter.
- Connect the cable to the Redmi Note 8 Pro.
- Start the engine (or turn on the ignition) - in some cars the lighter works only when the ignition is turned on.
- Wait for the charging icon to appear on the screen.
Critical: Never plug your smartphone into a lighter when the engine is off for a long time, which can drain the car's battery to a level where the car won't start.
💡
Car adapters with Quick Charge 3.0 charge the Redmi Note 8 Pro almost as fast as the original charging (up to 70% in 30-40 minutes).
5. Alternative power sources: solar panels and batteries
When you're out hiking or outdoors, you can use portable solar panels or even conventional batteries, which are exotic methods, but they work.
☀️ Solar panel
- 🌞 Need: panel power from 10 W with USB-exit.
- ⚡ Speed: 1-2% charge per minute (depending on the sun).
- ⚠️ Risks: Cheap panels can produce unstable voltage.
🔋 Battery Charging (through an adapter)
- 🧰 Need: adapter AA/AAA → USB (sold in tourism stores).
- ⚡ Speed: extremely low (0.1–0.3 A), but sufficient for an emergency call.
- 🔄 Enough for: 5-10% of the charge from 4 batteries AA.
⚠️ Warning: Do not use homemade circuits with 9V batteries ("crown") - they can give too high voltage and damage the power controller Redmi Note 8 Pro.
Charging via universal adapters (from other devices)
If you don't have a native charger, you can use adapters from other gadgets, but not all of them are safe.
🔌 What Adapters Are Good for the Redmi Note 8 Pro:
| The device | Power | Compatibility | Notes |
|---|---|---|---|
| Charging from a MacBook (USB-C) | 29-30 W | ✅ Yes. | Fast charging, but can warm up |
| iPad Adapter (12 W) | 12 Watts | ✅ Yes. | Slower than the native charging |
| Charging from Nintendo Switch | 18 W. | ✅ Yes. | The ideal option is the same power. |
| Adapter from the old Samsung (5 watts) | 5 watts | ⚠️ Partially. | Charges very slowly, only in emergency cases. |
❌ What Adapters Should Not Be Used:
- 🔌 Charges from old Nokia or Sony Ericsson (incompatible connectors).
- 🔥 Adapters with damaged cable or melted case.
- ⚡ Exit current charges >3 A (may damage the controller).
💡 Tip: If you're using someone else's adapter, check its power. 8 Pro: 5V/2And — 9V/2A. Quick Charge. 3.0). Information can be found on the adapter label.
7 Emergency measures: what to do if the smartphone is not charging
Sometimes the Redmi Note 8 Pro refuses to charge even from a working power source, and the reasons can be different, from a contaminated connector to a firmware failure.
🔧 Checking hardware problems:
- 🕳️ Clean the Type-C connector from dust with a toothpick (carefully!).
- 🔄 Try another cable - often the problem is with it, not the phone.
- 🔋 Connect to another power source (e.g. Power Bank).
🖥️ Policy solutions:
- 🔄 Reboot your smartphone (sometimes helps when the power controller fails).
- 🛠️ Reset settings through Settings → System system → Resetting settings (does not delete data!).
- 🔋 Enable Safe Mode (hold the power button) → "Safe mode") and check the charging.
⚠️ If nothing helps:
⚠️ Note: If the smartphone is not charging from any source, does not warm up and does not show the charging icon - it may be a malfunction of the power controller or battery. In this case, do not try to disassemble the phone yourself (risk of short circuit.