You just unpacked Xiaomi’s new smartphone — whether it’s the flagship Xiaomi 14 Ultra or the budget Redmi Note 13 — and the natural question is: how to properly charge your battery for the first time? There’s a lot of conflicting information on the Internet, from tips to “discharge to 0%” to instructions for 12-hour charging. Most of these recommendations are 10-15 years old and not only useless, but harmful to modern lithium polymer batteries.
In this article, we will analyze the current requirements for the first charging of Xiaomi smartphones based on official recommendations of the manufacturer and data from the battery research from CATL (the main supplier of batteries for Xiaomi), you will learn why a discharge of up to 0% reduces battery capacity by 2-5% after the first cycle, how the Mi Fast Charge system works when you first connect, and what settings in MIUI will help to extend the battery life by 20-30%.
Why the first charge is not a “calibration” but a normal cycle
Many users mistakenly believe that the first charge is a kind of “run-in” battery that determines its future capacity. In fact, modern lithium-polymer batteries (Li-Po) installed in Xiaomi smartphones do not require any special procedure when first used.
- 🔋 No memory effect: Unlike nickel cadmium batteries of the 90s, Li-Po batteries do not "remember" the level of charge. They can be charged from 20% to 80% every day - it will not affect the capacity.
- 🧪 Factory calibration: All Xiaomi batteries are tested in the factory, where they are discharged and charged to 100% to test capacity.
- ⚡ Fast Charging from the First Time: Mi Turbo Charge Technology (33W/67W/120W) It works at full capacity on the first connection – there are no restrictions.
The only thing that really matters is to avoid extreme conditions (0% and 100%) in the first weeks of operation. Battery University research shows that if you keep your battery in the range of 30-80%, its degradation decreases from 20% to 5% per year, but this rule is valid on a permanent basis, not just on the first charge.
Xiaomi’s official instructions: what the manufacturer says
Xiaomi’s smartphone user guides (including the 2023-2026 models) do not have a separate section on “first charge”; instead, the company gives general battery life guidelines that apply from day one:
⚠️ Note: In the documentation for Xiaomi 14 Pro and Redmi Note 13 Pro+ It says, "Use the original power adapter and cable for the first and subsequent charge. Avoid completely discharging and overheating the device." No mention of "training" the battery.
Moreover, Xiaomi service centers confirm that the warranty does not depend on how you charged the phone the first time, the only thing that can cancel it is the use of uncertified chargers or mechanical damage to the battery.
| The Myth of First Charge | Reality (according to Xiaomi) |
|---|---|
| Reduce to 0% before the first charge | ❌ Deep discharge reduces battery life by 1-3% cycle. |
| The first charge should be done for 12 hours | ❌ It doesn't make sense. Modern controllers turn off power at 100%. |
| You only need to use the original "box" charging | ✅ Right, but only for models with proprietary fast charging (e.g. Xiaomi) 13T Pro 120W). |
| The first 3 cycles must be charged to 100% | ❌ Not necessarily. Optimally, up to 80-90%. |
Use the original cable and adapter (if included)
Charge up to 80-100% without interruption
Do not discharge below 20% in the first days
Enable battery optimization in MIUI settings
Avoid overheating (do not play games while charging)-->
Step-by-step: how to charge the new Xiaomi correctly
If you discard myths, the procedure for first charging is extremely simple. Follow these steps to maximize the health of the battery:
- Unpack your smartphone and turn it on. Most Xiaomi models come with a charge of 40-60%. That's fine -- you don't have to specifically unload it before you turn it off.
- Connect the original charger. For models that support the Mi Turbo Charge (such as the POCO F6 Pro), use the native adapter – it is optimized for fast charging without overheating.
- Charge to 80-100%. Optimally up to 80%, but if you need 100%, do not keep your phone charging for longer than 1-2 hours after reaching the maximum.
- Unplug and use as usual. There's no need to wait for a full cycle or do something special.
For removable battery models (such as some Redmi A2), the rules are the same – no special actions are required, the main thing is not to use cheap charges with AliExpress, which may not meet the Qualcomm Quick Charge or USB-PD standards.
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If your Xiaomi supports wireless charging (like the Xiaomi 13 Pro or Mix Fold 3), the first charge is better done by cable.
MIUI settings that will prolong battery life
Xiaomi’s current MIUI 14/15 smartphones have built-in charging optimization tools, which should be configured immediately after the first charge:
- Optimized charging (Settings) → Battery → Optimized charging): 📱 Automatically limits charge to 80% at night (if the phone is connected for a long time). 🔄 Learn your habits and get to 100% just before waking up.
- Energy saving mode (Settings) → Battery → Energy saving regime): ⚡ Limits background activity of applications, reducing heat. 🔋 Extends the working hours by 10-15% productivity-free.
Charge limitation
Xiaomi 12S Ultra
- 🛑 Allows you to manually set the maximum charge (e.g. 85%).
For Black Shark or POCO F series gaming smartphones, it’s also helpful to turn off background optimization for games (Settings → Special Features → Game Optimization) as it keeps the CPU on a voltage even when the screen is off.
How to Check Your Battery Health at Xiaomi
What not to do in the first few weeks of operation
The first 2-3 weeks are a critical period for a new battery, during which time it develops its "habits" to charge cycles.
- 🔥 Overheating: Don't play heavy games (Genshin Impact, Call of Duty Mobile) while charging. 40°C accelerates the degradation of the 30-40%.
- ❄️ Hypothermia: Charging in the cold (-10°C and below) may cause irreversible electrolyte damage.
- 🔌 Use of “non-facing” charging: Cheap cables without certification USB-IF They can cause unstable voltage, which leads to microdamage of the battery.
- 📵 Deep discharge: If the phone is turned off because of 0% — Don't turn it on right away. 10-15 Then charge it up to at least a minute. 5%.
⚠️ Note: If your Xiaomi supports reverse charging (e.g., Redmi Note 12 Pro)+), Don't use it in the first few days. Reverse Charge puts extra strain on the power controller.
Especially careful should be the owners of smartphones with graphene batteries (for example, the Realme GT Neo 3, although it is not Xiaomi). These batteries are sensitive to high charging currents in the first cycles. For Xiaomi, this is irrelevant – all models use classic Li-Po batteries.
Frequent questions about Xiaomi’s first charging
Even after reading the instructions, users still have some contentious issues, and let's look at the most popular ones:
❓ Should you discharge the new Xiaomi to 0% before the first charge?
❓ Can I use wireless charging for the first cycle?
❓ How long should the first charge last?
❓ What to do if after the first charge the battery quickly goes down?
❓ Can I use a power bank for the first charge?
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Xiaomi’s first charge rule is no extreme states. Charge as usual, but avoid 0% and 100% overheating and mechanical damage. Modern Li-Po batteries do not require “training” – their life depends on proper operation on a continuous basis, not on one first cycle.
Myths vs. Reality: What Really Works
There are still tips on the web that not only don't help, but also harm the battery.
| Myth | Reality. | Source |
|---|---|---|
| The first 3 charges should be up to 100%. | ❌ No proof. Manufacturers (including Xiaomi) don't demand it. | Battery University, Xiaomi Support |
| "You must discharge before you turn off before you first charge." | ❌ Deep discharge reduces the life of Li-Po batteries. | CATL Research (2022) |
| "You only need to charge with original charging." | ✅ Partly right. The Mi Turbo Charge requires a certified adapter. | Qualcomm Quick Charge spec |
| The first charge should be done 8-12 hours. | ❌ Absurd. Modern controllers turn off power at 100%. | Xiaomi Service Manuals |
| If you don’t calibrate the battery, it will die quickly. | ❌ Calibration is needed only when software failures, not when first use. | MIUI Developer Docs |
The only proven way to extend battery life is to keep the charge in the range of 30-80% and avoid overheating. All other manipulations with the first cycle are nothing more than a relic of the past, when smartphones were equipped with nickel-metal hydride (Ni-MH) batteries.
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If you bought a used Xiaomi smartphone, the first charge should be done according to a special scheme: discharge to 5%, then charge to 100% without interruption, which will help the power controller to “recalibrate” after the previous owner.