Owners of the popular budget smartphone often face the question of what kind of battery is installed in their device, especially when the autonomy begins to decline. Xiaomi Redmi Note 5A (also known as Redmi Y1 Lite) was released in 2017 and equipped with a non-removable lithium-polymer battery. Standard capacity of this battery is 3080 mAh, which at the time was considered a good indicator for entry-level devices.
Over time, the chemical composition of the battery degrades, leading to faster discharge and unexpected shutdowns of the gadget. Understanding the specifications and markings helps in choosing a quality replacement analogue. It is important to distinguish between original components and cheap copies that can not only poorly hold the charge, but also damage the power controller.
In this article, we will take a look at all the parameters of the standard battery, look at how to check its condition and provide a step-by-step replacement algorithm. You will learn how to extend the life of the current battery and what to look for when buying a new one.
⚠️ Warning: Failure to comply with safety precautions when working with lithium polymer batteries can lead to fire or bloating of the battery.
Technical characteristics of the full-time battery
The main power element in the Redmi Note 5A is the lithium polymer battery (Li-Po), which differs from the usual Li-Ion in its more flexible shape and the ability to create thin housings. The nominal capacity is 3080 mAh, and the typical one is about 3120 mAh, which provides an average talk time of up to 15-20 hours. The battery voltage is 3.85 V, and the maximum charging voltage reaches 4.4 V.
The dimensions of the cell are strictly standardized for the internal body of the smartphone, so installing the battery from other models is almost impossible without mechanical modification, which is not recommended.The model code of the original battery is BN37 or BN44 (depending on the revision and delivery region), and these markings should be searched for when buying.
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When buying a new battery, always check the model code (BN37/BN44) with the sticker on the old battery to avoid problems with the coil and controller compatibility.
The charge rate of the device is limited to a standard current of 1A or 1.5A, so the full cycle of recovery of capacity takes about 2.5-3 hours. Using more powerful chargers will not speed up the process, since the controller inside the phone will limit the incoming current.
How to determine the wear of the battery
The degradation of a chemical current source can be measured by a number of indirect signs that occur during operation, the first and most obvious symptom being a sharp drop in charge: the phone can show 20%, and after 10 minutes of operation it will turn off, indicating that the residual capacity has fallen below the critical level.
Another sure sign of the need to replace is the bloating of the case, if the back cover of the smartphone began to move away or the screen rose, then the inside of the battery went chemical reactions with the release of gas, to operate such a device is strictly prohibited, because there is a risk of depressurization and fire.
- 📉 The smartphone turns off when charged 15-30% without warning.
- 🔋 The device is charged to 100% post 30-40 minutes, but discharges in an hour.
- 🌡️ Strong heating of the lower body during charging or simple tasks.
- 📱 The message "Connect the charger" when there is a charge.
For more accurate diagnosis, you can use an engineering menu or third-party applications, although they only show a software assessment of the condition ##6485##, where MB_06 show the battery status (Good/Bad), MF_02 — number of full recharge cycles.
Replacement of the battery with your own hands
Battery replacement in Redmi Note 5A It requires precision and minimal tooling, because the back cover is non-removable and is glue-based. First, you need to turn off the device and remove the tray. SIM-Next, using a thin plastic card or a special mediator, you need to gently flick the back cover around the perimeter, warming the edges with a hairdryer to temperature. 60-70 glue-softener.
Once the lid is removed, the insides are accessed, where the battery is closed with a metal plate or a plastic pad attached to the screws. When you unscrew the fasteners, you need to disconnect the battery plume from the motherboard. To extract the cell itself, special sticky strips are often used, which you need to slowly pull to avoid damaging the battery shell.
☑️ Replacement tools
The new element is installed in reverse order: the plume is connected, the phone is checked, a new layer of glue or double-sided tape is applied to the case, and the back cover is pressed, and it is important not to damage the display plumes and buttons that may be located in the immediate vicinity.
⚠️ Warning: When unsticking an old battery, do not use metal objects to avoid piercing the battery case.
Comparison of the original and analogues
The component market is crowded with offers, but choosing a quality battery for the Xiaomi Redmi Note 5A can be tricky.The original always has clear labeling, smooth seams and protective holograms, while copies often feature blurry text and less weight.
| Parameter | Original (OEM) | Quality analogue | Cheap copy |
|---|---|---|---|
| Capacity | 3080mAh (real) | 2900-3000 mAh | 1500-2000 mAh |
| Cycle resource | 500+ cycles | 300-400 cycles | 50-100 cycles |
| Controller | Protected. | Basic protection | Absent. |
| Price. | Tall. | Medium | Low. |
Using cheap copies can lead to unstable touch screen performance due to tips, as well as rapid failure of the charge controller. Quality counterparts from well-known brands (Nohon, Deji, Cameron Sino) often offer even more capacity than the original, through the use of more modern cells.
When choosing, pay attention to the date of production: lithium batteries lose their properties even during storage, so the element that has been in storage for 3 years will no longer have the declared characteristics.
Labeling secrets
Long-term extension advice
To make a new or current battery in the Redmi Note 5A last as long as possible, certain rules of operation must be followed: Lithium polymer cells do not like extreme states: deep discharge to zero and constant charging at 100%. The optimal range for a long battery life is from 20% to 80%.
Temperature is also critical: Overheating above 45 degrees accelerates the degradation of chemical processes, and frost below -10 degrees can temporarily reduce the discharge capacity or damage the structure of the electrolyte.
- 🔌 Use only certified cables and power supplies.
- 🌙 Disable unnecessary functions (GPS, Bluetooth) in the background.
- 📲 Update to the latest version to optimize your energy consumption.
- 🛑 Do not play heavy games while charging the device.
If you don't plan on using your phone for long periods, leave the battery at 50-60% and turn it off. Storing it fully charged or completely discharged will cause irreversible changes in the cell structure.
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The golden rule: avoid extreme temperatures and deep discharge to maintain up to 80% of battery capacity after 2 years of use.