First charging of the new smartphone Xiaomi: full instructions for extending the life of the battery

You just unpacked the new Xiaomi — whether it’s the flagship Mi 14 series, the budget Redmi Note 13 or the gaming POCO F6. The first thing to do after turning on is to properly charge the battery. This depends on how long the battery will hold charge after a year or two of active use. In this article, we will analyze the myths and facts about the first charge, select the optimal settings and tell you what errors reduce the life of lithium-ion batteries by 30-50%.

Xiaomi manufacturers do not always describe the process of first charging in detail in the instructions, limiting themselves to the standard phrase “use the original charger.” Meanwhile, modern smartphones with support for fast charging (for example, the 120W HyperCharge in the Xiaomi 14 Pro) require a special approach. We tested the recommendations on devices from 2023-2026 and collected data from official sources, including service manuals Mi Service.

Myths about the first charge: what actually harms the battery

There are a lot of tips on how to “swing” a battery — from full discharge to three-fold charging in a row — that have been out of date 10 to 15 years ago when smartphones used nickel-metal hydride (NiMH) batteries. Modern lithium-ion and lithium-polymer (Li-Po) batteries at Xiaomi work on a different principle.

Here’s what you can’t do with the new Xiaomi in 2026:

• 🔋 Bring to full discharge (0%) - this causes irreversible degradation of the battery cells.
• ⚡ Charge 12+ For hours in a row "for calibration" - modern controllers themselves turn off power at 100%.
• 🔥 Use non-original chargers with higher power 65W without the support of Quick Charge protocols or PD.
• 🌡️ Charge below 0 temperature°C or higher than 40°C – This reduces capacity by 20–30% in 6 months.

Xiaomi’s official position (from the Mi 13 Ultra user manual) is that “For maximum battery life, avoid extreme charge levels. The optimal range is from 20% to 80%,” as confirmed by independent tests from DXOMARK’s lab, where smartphones with a “spare” charging mode lost only 5-7% of capacity in a year versus 15-20% in aggressive use.

Preparing for the first charge: what to do before connecting to the network

Before you plug the cable into the socket, follow a few simple steps that will help avoid typical problems, from overheating to incorrectly determining the level of charge.

1. Update your firmware. Go to Settings → About Phone → Update your system and install the latest version of MIUI. New builds often optimize power management algorithms. For example, MIUI 14 added Adaptive Charging, which automatically limits your charge to 80% at night.
2. Set up the charging mode. In the Settings menu → Battery → Charging settings select: 🔄 Regular charging - for everyday use; 🛌 Optimized charging – if you leave your phone overnight; ⚡ Fast charging – only when urgently needed (regular use reduces battery life).

Check the cable and charger.

Xiaomi

Mi

3C

CE

5V==3A

9V==2A

If you bought a smartphone with your hands or it was in stock for more than 6 months, the first charge should be slow (use a charger on 5W-10W).This is due to the fact that lithium-ion batteries in the “sleep” mode lose part of the capacity, and a sharp current can cause delimitation (destruction of the structure of the electrodes).

Next articleHow to Charge the New Xiaomi for the First Time

Follow this algorithm to properly “wake up” the battery and configure the power controller:

1. Connect the original charger. Use a complete USB-C cable (for models up to 2022 – USB Type-A). If the charger is lost, choose an adapter with Quick Charge 3.0+ or USB-PD (for example, Xiaomi GaN Charger 65W).
2. Wait for 20 to 30 percent. Don't plug your smartphone into the socket right after you unpack. If the battery is low to zero, wait 10 to 15 minutes after you plug in before you press the power button, which will prevent power surges.
3. Charge up to 80% without interruption. The ideal option is to use Settings → Battery → Charging settings. If you don’t have that option (like the POCO M6 Pro), disconnect your phone from the network when you reach 80%.
4. Give the battery a rest. After the first charge, don't use your smartphone for 1-2 hours, which is to stabilize the chemical processes inside the battery.
5. Repeat the cycle 2-3 times. During the first week of operation, try to keep the charge level in the range of 30-80%.

Important! If your Xiaomi supports wireless charging (such as the Xiaomi 14 or Mi Mix Fold 3), it is better to use a wired method for the first charge. Induction charging heats the battery more, which negatively affects its life in the long run.

💡

To check the actual state of the battery, type in the Phone app code ##4636##, then select Battery Information. Health should show a value close to 100%.

Optimal charging settings in MIUI: what to turn on and what to turn off

Xiaomi offers several built-in features to extend battery life, but some are disabled by default or hidden in the depths of the menu.

• 🔄 Adaptive Charging (Available in the Application) MIUI 13/14 It analyzes your habits and automatically limits the charge to 80%, If the phone is connected to the network for a long time (for example, at night). → Battery → Charging settings.
• 🛡️ Battery Protection: Limits the maximum charge level to 90 percent or 95 percent, useful if you rarely use your smartphone at full power.
• ⚡ Fast Charging is on by default, but it should be turned off if you're in a hurry. 120W HyperCharge heats up battery to 40-45°C, which speeds up wear, only use if you need a quick charge recovery.
• 🌙 Overnight Charging Optimization - Learns your sleep schedule and charges your phone up to 100% by waking time.

For models without the options listed (such as the Redmi 12C or POCO C55), you can manually limit the charge using applications like AccuBattery (available on Google Play), the app tracks the charge level and notifies when it is time to turn off the cable.

Top.-5 Mistakes that kill Xiaomi battery 6 months

Even if you did the first charge correctly, further errors can nullify the effort. Here are the most common Xiaomi user blunders, based on service center data:

⚠️ Attention! Use of cheap powerbanks with higher power output 20W Without Quick Charge support, the battery cells are being repolarized.In 2023, Xiaomi recalled Redmi Power Bank. 20000mAh It's because of this problem.

• 🔌 Keeping your phone plugged in for a day is the worst thing you can do. At 100% charge, the battery terminals are at their maximum voltage, which speeds up electrode oxidation. Recommendation: Remove from charging at 80-90% or use Adaptive Charging.
• 🎮 Running Genshin Impact or Call of Duty Mobile on a background of fast charging heats the processor and battery to 50-55°C. At this temperature, battery capacity drops by 30-40% in 3-4 months. Solution: if you need to charge urgently, turn on Battery mode in the game settings.
• ☀️ Charging in the sun or in the car Temperature above 40°C triggers irreversible reactions in the electrolyte. 13T If you overheat, you have an emergency charging shutdown, but the battery itself is already damaged.°C before connecting to the network.
• 🔄 Frequent full discharges 0-100% cycles reduce battery life by 2-3 times. Optimal range is 20-80%. If the phone is dead before switching off, charge it to 20%, then turn it off for 10 minutes and continue charging.
• 💾 Use of uncertified cables Cheap cables without protection from voltage surges can supply current above the permissible (for example, 12V instead 9V). This results in a battery bloating or protection trigger with the Charging paused error.

In 2026, Xiaomi added notifications to MIUI about “unhealthy” charging habits: If you see a message from the battery overheating. Turn off the charger, immediately follow the recommendation — it’s not just a warning, but a signal about the risk of battery damage.

How to extend the life of Xiaomi battery: tips based on tests

DXOMARK Lab tested 50 Xiaomi smartphones and found that, if you follow simple rules, the battery loses no more than 10% of capacity in 2 years.

1. Use the "dark theme" and AMOLED-The black pixels on the screens. AMOLED-displays (for example, in Xiaomi 14 or Redmi) K70) They don't consume energy. Include a dark theme in Settings. → Display. → Dark theme and set the time for automatic switching.
2. Limit background activity. Apps like Facebook, TikTok or WhatsApp use up to 15 percent of their charge per day due to constant sync. Go to Settings → Apps → Permissions → Autostart and disable autostart for unnecessary programs.
3. Set up "Battery Mode." MIUI There is a built-in mode Ultra Battery Saver (Settings) → Battery → Battery mode. It turns off background processes and limits performance, but extends the running time to 20-30%.
4. Store your phone with 40 to 50 percent charge. If you don't use your smartphone for a long time (like a spare POCO X5), discharge it to 40 to 50 percent and turn it off. A fully charged or discharged battery degrades 3 times faster.
5. Calibrate the battery every 3 months. cycle "0-100%" (without interruptions) to reset the controller data. This is especially important after MIUI updates, when the system may not display the charge level correctly.

Inside from a Xiaomi engineer: 2026 smartphones (such as the Xiaomi 14 Ultra) use a dual battery (two cells of 2,500 mAh), which is better at distributing loads and retaining capacity longer, but if one cell fails, you can’t replace it separately, you’ll need a full battery replacement.

💡

The most effective way to extend battery life is to keep the charge in the range of 30-80% and avoid overheating, and even without the use of smart MIUI functions, this will increase battery life by 40-50%.

What to do if the battery is discharged quickly after the first charge

If after the correct first charge, the smartphone still sits down in a few hours, the problem may be:

• 📱 Background consumption - check the statistics in Settings → Battery → Battery utilization;
• 🔄 Unoptimized firmware - update MIUI or reset the settings;
• 🔋 Refused battery – if the phone is new, contact the service center under warranty;
• 🌡️ Overheating – use the app CPU Monitor to track processor temperature.

For diagnosis:

1. Go to Settings → About Phone → All Specifications → Battery status.
2. If the health value is below 90%, the battery is already worn out.
3. Check the battery temperature - the norm is up to 35 ° C when charging and up to 40 ° C under load.

⚠️ Attention, if after the update MIUI The phone starts to discharge 20-30% faster, perform a cache reset: 1. Turn off the phone. 2. Press the Power. + Volume Up before the Mi. 3 logo appears. From the Recovery menu, select Wipe Cache (control - volume buttons.

FAQ: answers to frequent questions about charging Xiaomi