How to charge Xiaomi Redmi: a complete guide to saving the battery 2-3 year-end

Xiaomi Redmi smartphones are known for their performance and availability, but even the most reliable models face the problem of battery wear, 68% Users notice a decrease in battery capacity through 12-18 months of active use, and in 80% In this article, we will discuss not only the basic rules, but also the hidden settings. MIUI, which helps to extend the life of the battery 30-40% longer than the standard period.

Many people think that it's enough to use "native" charging — but that's only 20 percent of the success. In fact, battery wear is influenced by ambient temperature, percentage of charge when connected to the network, the choice of charging mode in the settings, and even what applications work in the background. We tested 15 Redmi models (from the Redmi Note 4 to the Redmi 13 Pro) and found universal principles that work regardless of the year of release.

It’s important to understand that lithium polymer batteries (namely, they are in Xiaomi smartphones) degrade even under ideal conditions – but the right habits can slow this process down in the future. 2-3 For example, a constant charge to 100% higher-temperature 30°C reduces the battery life by 15-20% And here's keeping the charge level in range. 30-80% Using slow charging at night increases the service life of the 40%. Next – specific instructions with explanations.

1.What Charge to Use for Redmi: Original vs Alternatives

The manufacturer always recommends using a bundle charger — but what to do if it gets lost or broken? — The rule of thumb is that the power supply must meet the supported standards of your model.+ supportive 120W HyperCharge, and Redmi. 10A — only 10W. Using a more powerful adapter won’t hurt your smartphone (the charging controller will limit current), but a less powerful one can cause you to overheat.

Note the certification: Xiaomi’s original charging is labeled MDY-XX-XX (where XX — Alternative units must be Qualcomm Quick Charge certified (for models with fast charging support) or USB-IF. From proven brands, you can recommend Baseus, Anker and Ugreen - but only if their power coincides with the original.

• ✅ Original charging is the best option, guarantees compatibility with protocols MI Fast Charge.
• ⚠️ Alternative charging is only with the same power and certificates, for example, for the Redmi Note 11 (33W) It's a Baseus fit. 30W, not Samsung 25W.
• ❌ No-name charging – the risk of overheating, unstable voltage and damage to the power controller.
• 🔋 Wireless charging – only supported in Redmi models K50 and newer, but reduces the effectiveness of 20-30%.

⚠️ Warning: If after connecting an alternative charging smartphone heats up above 40°C (can be checked in the Settings menu) → Battery → Battery status, immediately shut it down. Overheating above 45.°C triggers irreversible chemical processes in the battery.

2.The optimal percentage of charge: why 100% and 0% are harmful

Lithium-polymer batteries are most vulnerable to extremes of charge.Battery University research shows that continual charging to 100% reduce the battery life by 30-50% post 12 The optimal range — 30-80%. But how do we do that in practice?

In smartphones Xiaomi on the basis MIUI 12+ There is a hidden function Optimized charging (path: Settings) → Battery → Battery settings → Optimized charging: It automatically limits the charge to 80% and only brings it up to 100% before you expect to shut down (based on your habits). For example, if you normally take your phone off the charge at 7:00, the system will calculate the time to safely dial up the capacity.

For models without optimization (e.g. Redmi) 9A) You can use third-party apps like AccuBattery (available on Google Play), which tracks charging cycles and warns you when to turn off power, and it's also useful to include an 80 percent notification in your battery settings.

3. Fast charging: when it is useful and when it is harmful

Technology Fast Charge, Quick Charge and HyperCharge from Xiaomi allow you to charge your smartphone for a long time 30-60 And then you have the flip side of it, and fast charging raises the temperature of the battery. 10-15°C, which accelerates wear. For example, when using 120W Redmi Note charging 12 Pro+ battery heated to 42-45°C, which reduces its resources by 15-20% yearly.

When you can use fast charging:

• 🚀 In emergency cases, when you need to urgently replenish the charge before leaving.
• ❄️ At ambient temperature below 25°C (e.g. in an air-conditioned room).
• 🔄 For "recharging" before 50-60% (The safest range for fast charging).

When it is best to avoid fast charging:

• ☀️ At temperatures above 30°C (for example, in the summer in the car or in the sun).
• 🌙 At night, when the phone is on charge for a long time.
• 📉 If the battery capacity is already below 80% of the original (checked in Settings) → Battery → Battery status).

To turn off fast charging on Redmi models with MIUI 13+, Go to Settings. → Battery → Battery settings → Quick charging and deactivate the option. On older versions of the firmware, you may need to disable USB-Debugging and entering the command through ADB:

adb shell settings put global fast_charge 0

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If your Redmi supports wireless charging, use it only as a last resort. wireless power efficiency is 30% lower and battery heating is higher than wired charging.

Charging at night: myths and reality

One of the most common questions is, can you leave the Redmi on charge all night? The answer depends on the model and version. MIUI. Modern smartphones (starting with the Redmi Note 10) have built-in protection: after reaching 100%, they go into “trickle charging” mode, where the current is supplied in small portions to maintain the level%.

What happens to the battery during night charging:

1. First-time 1-2 Hours: Active charging until 100% heat-up 35-40°C.
2. The rest of the time: keep the charge at the level 98-100% with periodic microcycles that also wear out the battery.

How to charge at night with minimal damage:

• 🌙 Use Optimized Charging (Limited to 80% until morning).
• ⏱️ Set the alarm clock to 1-2 One o'clock and turn off the charging manually.
• 🔌 Use a charge with no higher power. 10W (For example, from Redmi. 9A).
• 🧊 Remove the case and put the phone on a hard surface for better cooling.

⚠️ Warning: If you notice that after overnight charging, the phone discharges faster than usual (for example, from 100% to 80% in 1 hour), this is a sign of damage to the power controller.

5.Temperature: how not to "kill" the battery with heat or cold

Lithium polymer batteries are extremely sensitive to temperature — 10-30°C. When these limits are exceeded, irreversible changes occur:

• 🔥 Higher. 40°C: electrolyte decomposes, capacity falls on 1-2% hourly.
• ❄️ Below 0°C: Lithium ions stop moving, the battery may not charge at all.
• 🌡️ 30-40°C: accelerated wear (loss) 5-10% capacity 3 month).

How to control the temperature:

1. Use the app. AIDA64 or the built-in Settings menu → Battery → Status of the battery for monitoring.
2. Avoid charging in the sun, in the car in the summer or near heaters.
3. If the phone is heated above 40°C, unplug it from charging and let it cool to 30°C.
4. In the winter before charging on the street hold your smartphone 10-15 Minutes in warmth (e.g. in your pocket).

For models with liquid cooling (Redmi) K60, POCO F5) The risk of overheating is lower, but it is still not recommended to charge the device at temperatures above 35.°C. If you live in hot climates, consider buying a cooling stand with a fan (e.g. Baseus Cooler).

6.How to charge the new Redmi: the rules of battery run-in

There is a myth among users about the "swing" of the battery (a few cycles of complete discharge-charging). For modern lithium polymer batteries, this is not only useless, but also harmful. 3-5 Charging cycles still require attention:

• 🔋 First charge: Charge your phone to 100% And let's just stand on the charge again. 1-2 hour (for calibration of the controller).
• 📉 First discharge: discharge to 10-15%, Then charge it again. 100%. Repeat. 2-3 once.
• ⚡ Charging mode: in the first days, avoid fast charging - use a power supply 5W-10W.
• 🔄 Calibration: After 5 cycles, reset the battery statistics to Settings → Battery → ⋮ → Resetting battery statistics.

Why does it matter? In the first cycles, the power controller learns to determine the actual battery capacity. If you use fast charging or undercharge the phone right away, you may experience errors in the display of the percentage of charge (for example, jumps from 30% to 1% in a few minutes).

For models with MIUI 14+ There's an option called Adaptive Charging, which is hidden in the battery lab, and it analyzes your habits and adjusts the charging algorithms for maximum lifespan, and it activates it:

1. Go to Settings. → Battery.
2. Slip 5 times on the battery icon (the hidden menu will open).
3. Select Adaptive Charging and turn it on.

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First-time 5 The new Redmi's charging cycles form the battery controller's "memory," and the correct run-in increases the accuracy of the charge display and extends the life of the battery. 10-15%.

7. Frequent Mistakes: What You Shouldn't Do

Even power users sometimes make mistakes that shorten battery life.-5 bait-bit:

1. Using your phone while charging for games or videos.CPU load + charging = temperature°C. For example, Genshin Impact on Redmi Note 12 Pro heats up the battery to 50 while charging.°C in 20 minutes.
2. Charging from USB-computer port or power bank without Quick Charge support (0.5A) This can lead to incomplete charging and controller errors.
3. If you leave the Redmi with 0% charge for 3 months, the battery can lose up to 50% of capacity due to deep discharge.
4. Use of damaged cables. Grated insulation or bent connectors cause voltage surges. Check the cable for Qualcomm Certified markings.
5. Disable "Optimized Charging" for the sake of speed. According to Xiaomi, users who disable this feature, turn to the service about the battery 2 times more often.

Another common problem is the use of non-original wireless charging, such as cheap Qi panels that can deliver current. 1.5A substitute 1A, If you notice that wireless charging has become worse (the phone is warming or not holding charge), check the back cover for bloating - this is a sign of damage.

8 How to check the status of the battery and when to change it

The battery life of Xiaomi Redmi is 400-600 Full charge cycles (depending on the model) and then the capacity drops below. 80%, And the phone starts to run out in a few hours, and you can check the current state in a number of ways:

• 📊 Built-in diagnostics: Settings → Battery → Battery status: If the capacity is below 85%, it's time to think about replacing it.
• 🔧 Code. USSD: enter ##4636## → Battery information. Level will show the actual charge, and health will show the status (good/unknown problem).
• 📲 Third-party applications: AccuBattery or CPU-Z will show the number of charging cycles and current capacity in mAh.

Signs that the battery should be changed:

If you decide to replace the battery yourself, buy only original batteries with the label. MBP (for example, MBP11 Forged products can swell or ignite:

• Plastic mediator to open the body.
• Hair dryer or a station for heating the glue (temperature) 60-80°C).
• A new adhesive (bilateral scotch) for battery fixation.

⚠️ Warning: When replacing your battery yourself, never use metal tools to detach the plume! Contact damage can short circuit. If you are unsure of your skills, contact Xiaomi's authorized service - the replacement cost there starts at 2000 ₽ (diagnostics).

FAQ: Answers to Frequent Questions