Smartphone Xiaomi Redmi Note 8 Pro became one of the first mid-range devices that received support for fast charging technology with a capacity of 18 W. Owners often wonder what kind of power supply is needed to effectively restore the energy of the battery with a capacity of 4500 mAh. The correct choice of adapter directly affects the heating speed of the device and battery durability.
Using an incompatible or too weak charger can cause the smartphone to charge for hours, especially if the screen is on. In this article, we will discuss in detail the technical specifications, cable requirements and the features of the Quick Charge 4+ protocol in this device.
It is important to understand that a lithium polymer battery is sensitive to the quality of the current supplied. Although the power controller inside the smartphone is able to regulate the incoming energy flow, using certified accessories provides maximum safety.
Technical characteristics of the power supply system
The basis of the power system of the model is a battery type Li-Po with a declared capacity of 4500 mAh. For its efficient operation, the manufacturer has laid support for the Quick Charge 4+ standard from Qualcomm. This means that the device can receive increased current provided that the power source is able to provide it.
The baseline, which depended on the region of sale, often included an 18W or 22.5W adapter. However, the smartphone board itself is designed with a margin of safety. It recognizes the type of cable and power supply connected, automatically selecting the optimal mode of operation.
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The Redmi Note 8 Pro supports up to 18W of Quick Charge 4+ power, allowing you to charge the battery from 0 to 100% in about 1 hour and 45 minutes.
It's worth noting that there's a USB Type-C port that's symmetrical. It makes connectivity easier, but it imposes quality requirements on the connector itself. Cheap cables may not support high currents, which will cause charging speeds to drop to a standard 10W or even 5W.
Compatible types of chargers
When choosing an adapter for the Redmi Note 8 Pro, you do not need to look for the original unit with the Mi logo. The accessories market offers many alternatives that work correctly.
The most versatile solution is the USB Power Delivery (PD) adapters, which provide stable voltage and can dynamically change current strength, and Qualcomm Quick Charge 3.0 and 4.0 units also work well.
- 🔌 Xiaomi Adapters: Fully compatible and working with all indicators on the screen.
- ⚡ Samsung Adaptive Fast Charging: Often compatible with common voltage standards.
- 🛡️ Certified third-party brands: Anker, Baseus, Ugreen with support QC 3.0/4.0.
- 💻 USB-Computer ports: suitable only for slow charging or data transfer, current is limited 0.5-0.9 And.
Using high-powered power supplies from laptops (such as 45W or 65W with PD support) is also safe. The smartphone will take only as much power as it needs, and no more. The PMIC (Power Management Integrated Circuit) controller will protect the device from overload.
Requirements for fast charging cables
Even the most powerful power supply will not provide fast charging if a poor-quality cable is used. The wire should be able to pass current of at least 2 Amps, and ideally up to 3 Amps. The internal resistance of a cheap cable can extinguish the voltage, and the smartphone will go into normal charging mode.
Pay attention to the labeling. For the full operation of Quick Charge 4+, a USB-IF certified cable is desirable. Such cables often have the label "3A" or "5A" on the plug or package. The length of the cable also plays a role: the longer it is, the higher the voltage loss.
⚠️ Warning: If you don't see the Quick Charging animation or lightning on the screen when you connect the cable, try replacing the wire. Often, the problem lies in a damaged or too thin cable.
Visually high-quality cables are characterized by tight braiding and reliable contacts inside the Type-C connector. Using damaged wires where fractures or oxidation of contacts are visible can lead to unstable connection and sparking.
How to check the speed and status of charging
You can determine whether fast charging is working on your Xiaomi Redmi Note 8 Pro visually. When you connect a serviceable powerful adapter on the locked screen, a special animation with the words “Quick Charge” and percentage of charge appears on the locked screen.
You can do a more detailed analysis through an engineering menu or a special application, for example, the AccuBattery app shows the real strength of the current coming to the battery. If you see values in the region of 1400-1800 mA with a charged battery or above 2500 mA with a discharged battery, the system works correctly.