Xiaomi Redmi Note 5: how to charge correctly so that the battery lasts longer?

Xiaomi Redmi Note 5 is one of the most popular smartphones in the budget segment, released in 2018, but still actively used by millions of users. However, even such a time-tested device has a weak spot: a lithium-polymer battery with a capacity of 4000 mAh, which eventually loses capacity. Proper charging can extend the battery life by 30-50%, and the wrong one can kill it in a year. In this article, we will discuss 7 key charging rules that will help avoid typical errors and keep the smartphone’s autonomy at maximum.

Many Redmi Note 5 owners are facing problems: the phone quickly discharges, warms up when charging, or the battery suddenly “dies” after 2-3 years of use. Most often, it is not factory defects, but improper charging habits. We analyzed Xiaomi’s official recommendations, user reviews and battery research data to compile a current guide for 2026, taking into account the features of this model.

What charger should I use for the Redmi Note 5?

The standard Redmi Note 5 kit includes a charger with characteristics: 5V/2A (10W).This is the best option for daily use, but many users lose their native adapter or try to speed up charging with more powerful devices.

• ✅ The original adapter is the best choice. It's designed to be current-powered. 2A and does not overload the smartphone power controller.
• ⚠️ Charges from other Xiaomi (for example, from Redmi Note) 7/8 Quick Charge 3.0) It won't speed up Note charging 5, As the model does not support fast charging.
• ❌ "Nano-charges on 1A (For example, from old iPhones charge the phone 2 times longer and can cause overheating due to unstable voltage.
• 🔌 USB-PC/laptop ports give a current of 0.5–0.9A — That's enough to charge, but not for a full cycle.

Critical error: Using cheap wireless charging without Qi certification. Redmi Note 5 does not support wireless charging, and such devices can damage the power controller.

If the original adapter is lost, choose certified 5V/2A charging from proven brands: Anker, Baseus, Ugreen. Avoid no-name devices without specifying specifications.

The optimal charge level: why 20-80% is better than 0-100%

Lithium polymer batteries (including those in the Redmi Note 5) degrade faster under extreme charge levels. Research shows that charging constantly up to 100% reduces battery life by 30-40% in 2 years.

• 📉 Lower limit: do not allow the discharge below 15-20%. Deep discharge (0%) can disable the battery in 5-10 such cycles.
• 📈 Upper limit: it is ideal to turn off 80-85% charging. If you need 100%, charge to maximum only before long trips.
• 🔄 Partial cycles: It is better to charge the phone a little bit (for example, from 40% to 70%) than to drive from 0% to 100%.

The Redmi Note 5 doesn’t have a built-in charge limiting feature (as in the new Xiaomi models), but you can use third-party apps like AccuBattery to track levels and get notifications of reaching 80%.

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Turn on Battery Savings mode in settings (Settings → Battery → Saving mode) when the charge level drops below 20%. This will automatically limit background processes and prolong the running time.

The myth is debunked: many believe that the battery needs to be calibrated, fully discharged and charged up to 100% once a month. For modern lithium polymer batteries, this is harmful - this procedure accelerates degradation.

3.Temperature: Why the Redmi Note 5 doesn't like heat and cold

Temperature is the main enemy of the battery. Xiaomi Redmi Note 5 works optimally at 10-35 ° C. Here's what happens when you go beyond these limits:

• ❄️ Low 0°C: Battery capacity temporarily drops by 20–30%, and when charged, metallic lithium can form, which damages the electrodes.
• 🔥 Above 40.°C: The electrolyte oxidation accelerates, which irreversibly reduces the capacity. One case of overheating to 50.°C can reduce the service life by 10-15%.
• 🌡️ Ideal charging temperature: 18–28°C. Chemical processes are stable in this range.

How to avoid overheating:

• 🚫 Do not charge your phone in direct sunlight (for example, on a car torpedo).
• 🎮 Don't play hard games (PUBG, Genshin Impact – while charging – this loads the processor and raises the temperature.
• 📵 Remove the case if the phone is very hot (especially important for silicone cases).

⚠️ Note: If the Redmi Note 5 is heated above 45°C when charging (can be checked in the appendix) AIDA64), Disconnect it immediately from the grid. This may indicate a malfunction of the battery or charger.

4.How long should the Redmi Note 5 charge last?

When using the original 5V/2A adapter, the full charging cycle of the Redmi Note 5 takes 2-2.5 hours (0% to 100%).

If the phone charges for more than 3 hours, perform a diagnosis:

1. Try another cable and adapter.
2. Clean the USB-C port of dust and debris (you can use a wooden toothpick).
3. Check the temperature of the phone – if it’s hot, let it cool down.
4. Start Settings → Battery → Battery Status (if optional)

Try another cable |Clear USB-C|Clear the phone temperature |Use the original charger |Update the firmware-->

5.Can I charge the Redmi Note 5 overnight?

Charging your smartphone at night is one of the most controversial topics, and it's convenient on the one hand, but it can also damage your battery, and let's see how this works with the Redmi Note 5:

What happens when you exercise at night:

• 📱 The phone charges up to 100% and stays connected to the network.
• 🔄 The power controller turns off the current supply, but periodically (once every 1-2 hours) switches on recharging to maintain 100%.
• 🔋 These microcycles increase battery wear as it is constantly in a high voltage state.

How to minimize harm:

• ⏰ Use smart timer outlets (such as Xiaomi Mi Smart Plug) to turn off power 1.5–2 hours after you connect.
• 🛌 Turn on the flight mode at night - this will reduce the load on the battery and reduce the number of microcycles.
• 📉 Charge your phone to 80-85% before bedtime, not 100%.

⚠️ Warning: If you do charge the Redmi Note 5 overnight, never put it under your pillow or on soft surfaces (sofa, blanket) which disrupts the heat sink and can cause overheating.

6.How to extend the life of the Redmi Note 5 battery: more tips

Other factors affect battery life, as well as proper charging, here are 5 proven ways to extend the Redmi Note 5’s battery life:

• 🔄 Update the firmware. In new versions. MIUI Optimizes energy. Check for updates in Settings → The phone. → Updating the system.
• 🌙 Use a dark theme. AMOLED-Redmi Note 5 does not have screens, but the dark theme reduces the load on the processor when rendering the interface.
• 📶 Turn it off. 4G/LTE, The modem consumes a lot of power, especially in low signal conditions.
• 🔕 Adjust autobrightness. Manually tuning 50-60% of brightness saves up to 15% charge per day.
• 🧹 Clean the cache once a month. Clogged memory makes the processor work harder. Use Settings → Memory. → Clear the cache.

Extreme savings: If the battery runs out too quickly, activate ultra-saving mode (Settings → Battery → Ultra Mode).It turns off all background processes, leaving only calls and SMS, and can extend the phone with 5% charge for several hours.

⚠️ Warning: If the battery capacity has fallen below 70% of its original capacity (checked by AccuBattery), it is time to replace it.

7.Typical errors when charging Redmi Note 5 (and how to avoid them)

Even power users sometimes make mistakes that shorten the life of a battery. TOP-5 most dangerous:

• 🔌 Use of damaged cable, worn insulation or bent connectors can cause short circuits, check the cable for damage every 3 months.
• 🚗 Charging from the lighter in the car. The voltage in the on-board network of the car is unstable (may jump to the hop). 14V), What is harmful to the power controller.
• 💦 Charging in a wet room (e.g. in a bathroom) Water vapor can condense on the board and cause corrosion.
• 🔋 If you don't use the Redmi Note 5 for a long time, charge it up to 50% and turn it off. A full discharge in 2-3 months of storage can kill the battery.
• 🔄 Use Power Bank on a regular basis. Cheap external batteries often give out unstable voltage. If you use Power Bank, choose models that support Quick Charge 2.0 (for example, Xiaomi Mi Power Bank 3).

What if your phone is already “suffering” from a wrong charge?

• If the battery is swollen - immediately turn off the phone and contact the service.
• If the phone is quickly discharged, calibrate the battery: completely discharge it, then charge it to 100% without interruptions (once!).
• If charging is jerky (it connects, then turns off), clean the USB-C port with alcohol and compressed air.

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The most common reason for rapid battery wear in the Redmi Note 5 is the combination of high temperature and charging up to 100%. Avoid these two factors, and the battery will last 2 times longer.

FAQ: Frequent questions about charging Xiaomi Redmi Note 5