The first charge of the new Xiaomi Redmi Note: how to do it right and extend the life of the battery

You just unpacked the new Xiaomi Redmi Note smartphone — a bright screen, a powerful processor and the promise of long battery life. But how to charge it for the first time so that the battery lasts as long as possible? There are a lot of conflicting tips on the Internet, from “required to discharge to 0%” to “charge should last 12 hours.” We figured out the official Xiaomi recommendations, studied the technical specifications of lithium polymer batteries and prepared an up-to-date guide for 2026.

Spoiler: Modern Redmi Note smartphones (including the Note 12/13/14 series) don’t require battery calibration or “training” — a myth from the era of nickel-cadmium batteries. However, there are key rules that will help avoid premature wear and keep the capacity at 80%+ even after 2-3 years of active use.

Why First Charge Is Important: Myths and Reality

Many users believe that the first charging cycle determines the fate of the battery for years to come, which is partly true, but not for the reasons that are written in the forums. The fact is that lithium polymer batteries (used in the Redmi Note) are most vulnerable in the first 20-30 charging cycles, during which their chemical structure is formed, and the wrong actions can accelerate degradation.

However, there is no evidence that “three times charging to 100% in a row” or “discharge to shutdown” has any effect, and these tips were relevant for older battery types (NiCd, NiMH), but not for modern Li-Po. Moreover, a deep discharge (below 3%) can irreversibly damage the cells of the Redmi Note battery already in the first cycle.

• 🔋 Myth 1: "You have to completely discharge your smartphone before you charge it. 10-15%.
• ⚡ Myth 2: "The first charge should last. 8-12 Reality: Xiaomi's modern controllers automatically turn off power when they reach 100%.
• 📉 Myth 3: "If you don't calibrate, the battery will die quickly." Truth: calibration is only necessary when the software fails, not when you first charge.

⚠️ Warning: If you bought a Redmi Note with a charge level below 20%, do not turn it on immediately. connect to the original charger and wait at least 30% before the first turn on.

Step 1: Preparing for the first charge

Before you connect your smartphone to the outlet, follow a few simple steps that will help you avoid typical errors and ensure a safe process:

1. Check the package. The Redmi Note box should have an original charger (usually 33W for new models) and a USB Type-C cable. Using third-party accessories can lead to overheating or slow charging.
2. Check the connector. Make sure the Type-C port is free of dust, debris, or damage. Clean it carefully with a wooden toothpick (not metal objects!) if necessary.
3. Update. If your smartphone is already on, check for updates in Settings → About Phone → System Update. Newer versions of MIUI often optimize power management.

The Redmi Note 12/13/14 models support Quick Charge 3.0+, but only with original or certified adapters. Using cheap no-name charging can lead to:

• 🔥 Battery overheating (over 45)°C reduces resource by 30%).
• ⚡ Unstable voltage, which causes micro-damage to cells.
• 🐢 Slow charging (for example, 18 watts instead of 33 watts).

Use the original ZU from the set|Check the integrity of the Type-C cable|Make sure the charge level is higher 5%|Update. MIUI last-minute|Charging at room temperature (15-25°C)-->

Step 2: Optimal first-charging algorithm

Now, to the process itself, here's a step-by-step guide based on Xiaomi's recommendations and battery research:

1. Connect your smartphone to charge at 20-30% charge level. Don't wait for the discharge to 0% - this is stressful for the battery.
2. Use the original RAM and cable. If you charge from a laptop or power bank, it's slower but safer.
3. Don't interrupt charging until you reach 100%. Xiaomi's modern controllers automatically reduce current by the last 10% to protect the battery.
4. Turn off your smartphone from charging immediately after reaching 100%. Prolonged stay on charging (especially at night) accelerates degradation.

An important nuance: during the first 3-5 charging cycles, avoid intense loads (games, video editing, performance tests), this is due to the fact that lithium polymer batteries stabilize their structure in the first days of use, high temperatures (over 40 ° C) during this period can lead to irreversible capacity loss.

⚠️ Note: If your Redmi Note is warmer than 40°C during charging (can be checked in the application Battery and performance in the MIUI), Overheating on the first cycle may indicate a defect in the battery - contact the service center.

Right up to 100% and I'll leave it overnight.|Charge to 80% and shut down.|The following instructions from the article|I don't pay attention to the first charge.-->

Step 3: Set up MIUI for a long battery life

The correct first charge is just the beginning. To make the Redmi Note battery last longer, you need to configure several settings in MIUI. These options are often ignored, but they significantly affect battery life:

1. Adaptive charging. Go to Settings → Battery and Performance → Battery settings → Adaptive charging. Turn on the option. It limits charging to 80% at night and brings it to 100% by waking up (based on habits analysis).
2. Background optimization. In the same section, activate Background optimization. This will limit application activity in the background. Exception: Messengers (Telegram, WhatsApp) can be left without restrictions.

Performance mode.

• Select Balanced or Charge Saving in Settings → Battery → Performance Mode.
• High performance increases heating and charge consumption by 20-30%.

We also recommend turning off autobrightness and setting a fixed value at the level 50-60%. It is less convenient, but it saves you up. 15% Another hidden battery eater is the constant search of the network in the settings. SIM-If you are in stable coverage, turn off this option.

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Redmi Note 12/13 has a hidden function called Super Power Savings. To activate it, go to Settings → Battery → Super Savings Mode and select apps that will work in the background. This will extend battery life up to 2 times!

What not to do in the first few days of use

The first week of the Redmi Note is a critical period for the battery, during which its habits and chemical stability are formed.

• 🎮 Games at maximum settings. Genshin Impact or Call of Duty Mobile at high FPS heat up the processor 70-80°C, which is detrimental to the new battery.
• 🔌 Using wireless charging. Even if your model supports Qi, it's better to charge on cable for the first 5 cycles - so less heating.
• ☀️ Charging in the sun or in a hot room. Battery temperature is higher 30°C accelerates her ageing in 2-3 once.
• 🔄 Frequent reboots: Each on/off cycle consumes additional charge and creates microloads on the battery.

The combination of high load and charging is particularly dangerous. For example, if you play PUBG Mobile while connecting to an outlet, the battery temperature can exceed 50°C. In such conditions, lithium polymer cells lose up to 5% of their capacity in one cycle! If you need to charge and play urgently, use the FPS-restricted MIUI Game Mode.

How to check the health of the battery after the first charge

After 2-3 charge/discharge cycles, it's helpful to assess the battery status. MIUI has built-in tools for this, but they're hidden in the back of the menu.

1. Check through Settings: Go to Settings → Battery and Performance → Battery status. Pay attention to Capacity (should be close to passport, for example, 5000 mAh for Redmi Note 12 Pro+) and Temperature (normal: 25-35 °C).
2. Hidden Test through Code: Open the Phone app and dial ##4636##. Select Battery Information. This shows the actual charge level (in mV), temperature and condition (should be Good).

Third-party annexes:

• Install AccuBattery (available on Google Play) and it will show battery wear as a percentage and estimate the actual capacity.
• The norm for a new smartphone is 0-2% wear, and if the value is above 5%, this is an excuse to contact the service.

If after the first charge you see that the battery capacity is lower than the declared by more than 10% (for example, 4500 mAh instead of 5000 mAh), this may indicate:

• 🔋 Battery defect (marriage or damage during transportation).
• 📦 Improper storage in stock (prolonged stay at 0% or 100% charge).
• 🔌 Use of a non-original charger in the first hours.

⚠️ Warning: If you see Unknown or Replace battery status on AccuBattery or hidden menus, contact the seller immediately.This is a sign of a serious malfunction and continued use of the smartphone can be dangerous.

Long-term recommendations for the Redmi Note battery

The first charge is just the beginning. To ensure that the Redmi Note battery lasts 3-4 years without significant loss of capacity, follow these rules:

• 🔄 Avoid full cycles. Optimal charging range: 20-80%. Regular discharges to 0% and charge up 100% reduce the resource 30%.
• ⚡ Use slow charging at night. If you leave your smartphone on charging all night, turn off Fast Charging in the settings or use an adapter on your phone. 10-18 Watt.
• 🌡️ Watch the temperature. If the battery is heated above 35.°C (can be checked in Settings) → Battery, let it cool before charging.
• 📵 Turn it off. 5G/LTE, If you're not using it, the Redmi Note modem is in mode. 5G consume 40% more energy than in 4G.
• 🔋 Store your smartphone with 40-50% If you don't use the device for more than a week, discharge/charge it to this level. 0% or 100% kills the battery 3-6 months.

For the Redmi Note 12/13 models with support for fast charging 33/67/120 W, there is an additional rule: do not use maximum power all the time. Fast charging is convenient, but it increases the battery temperature by 10-15 ° C, which in the long run reduces its life. The best option is to charge 18-27 W (you can use an adapter from the Redmi Note 10).

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The key to the long life of the Redmi Note battery is to keep it in the 30-80% charge range and avoid overheating, which is easier than calibrating and "training," but works 100% of the time.

FAQ: Frequent questions about the first charge of the Redmi Note