Why the Redmi 5 Plus Battery Fails and When to Change It
Xiaomi Redmi 5 Plus (codenamed vince) was released in 2018, and after 4-6 years of active use, its battery inevitably loses capacity. Even with careful handling, lithium-ion batteries degrade: after 500-800 charging cycles, their capacity drops by 30-50%. Owners of Redmi 5 Plus begin to notice problems when the phone discharges in 2-3 hours, turns off at 20-30% charge or overheats during charging.
The main signs that the battery is time to change:
- 🔋 Sudden shutdowns at charge level above 15%
- ⚡ The smartphone is heated even with minimal load
- 📉 Battery life has been reduced by 2-3 times
- 🔌 Charging is jerking or interrupted
If you see at least two of these symptoms, replacing the battery is not a whim, it's a necessity. Postponing repairs can cause not only discomfort, but also damage to the board due to overheating or power surges from a faulty battery. By the way, the Redmi 5 Plus has a 4000mAh non-removable BL-5A31 battery, which requires disassembling the case.
How much does it cost to replace a battery in service centers?
The battery replacement prices in the Redmi 5 Plus vary by region, service center status and battery type used, and in 2026, the average prices are as follows:
| Type of service | Cost of work (₽) | Battery cost (₽) | Totally (₽) |
|---|---|---|---|
| Official Xiaomi service | 1 200–1 800 | 1 500–2 200 | 2 700–4 000 |
| Authorized partner | 800–1 500 | 1 200–1 800 | 2 000–3 300 |
| Informal service | 500–1 200 | 800–1 500 | 1 300–2 700 |
| Self-sustaining replacement | 0 | 700–1 400 | 700–1 400 |
Important: official Xiaomi services use original batteries with a warranty of 6-12 months, but the price is higher by 30-50%. Unofficial workshops often put Chinese counterparts from the brands ZOP, CAM or BASN, which are cheaper, but can last 20-30% less. Before repair, specify which battery will be installed!
⚠️ Some services offer a “budget replacement” for 900-1200 ₽, But they use batteries of questionable quality with a capacity of 3,500-3800 mAh instead of the original 4000 mAh.
Where to buy a battery for self-replacement
If you're choosing to change the battery yourself, it's important to choose a reliable seller.
- 🛒 AliExpress - Prices from 700 ₽, But it takes 2-4 weeks to get it delivered%+ And the reviews in Russian: ZOP Power, CAM Battery.
- 🏬 Beru.ru / Yandex Market - batteries from 900 ₽, Delivery 1-3 days Pay attention to the description: original art. BL-5A31 or.
- 🔧 Radio parts stores (for example, Chip and Deep) - prices from 1,200 ₽, You can check the battery before buying it.
- 🌍 Overseas sites (eBay, Amazon) – expensive (from 1,500) ₽), There are original batteries with a guarantee.
When choosing, pay attention to:
- 🔍 Capacity: must be at least 4000 mAh (the original - 4000 mAh, type Li-Polymer).
- 📦 Package: the set must have adhesive strips to fix the battery.
- 📄 Warranty: minimum 6 months (good sellers have 12).
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Before buying, check the battery serial number on the manufacturer's website (if indicated).Fakes often have blurry labeling or typos in the labeling.
Step-by-step: how to replace the battery yourself
Replacing the battery in the Redmi 5 Plus requires care and a minimal set of tools. If you've never disassembled a smartphone, you'd better contact the service.
Plastic mediator or guitar mediator | Cross screwdriver (PH00) | Screen sucker |Pinzet|Fen or thermo-air station (optional)
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Step 1. Turn off the phone and remove the back cover.
Heat the screen edge with a hair dryer (60-70°C) for 1-2 minutes to soften the glue. Carefully apply the cover to the mediator starting at the bottom edge. Do not force - you can damage the plumes!
Step 2. Disconnect the battery plume.
When you take the lid off, you'll see the battery glued to the body. Unscrew the 4 screws holding the metal plate, and unplug the battery plume with tweezers. Don't pull the wires!
Step 3. Remove the old battery.
Put a plastic blade on the battery and slowly separate it from the body. If the glue is too strong, use isopropyl alcohol to dissolve. Don't prick the battery, it can cause fire!
Step 4. Install a new battery.
Stick the new battery onto double-sided tape (comes with it), connect the plume and assemble the phone in reverse order. Before turning on, check that all the plumes are tightly connected.
⚠️ Warning: If the phone doesn't turn on after you've changed, check: Battery plume connection (contacts should click) integrity of flexible screen plumes and power buttons. Charging - sometimes a new battery takes 10-15 minutes to activate.
What if your phone doesn’t see a new battery?
How to check a new battery after replacement
After installing the new battery, you need to make sure it works correctly.
- Capacity check: Install the AccuBattery (Android) app and complete 2-3 full charge/discharge cycles. Capacity should be close to 4000 mAh (permissible deviation - ±5%).
- Heat test: Run a resource-intensive application (e.g., 3DMark) for 10-15 minutes, and the battery temperature should not exceed 40°C.
- Calibrate the controller. Charge the phone to 100%, then discharge until it turns off automatically. Repeat 2 times, this will help the system correctly display the charge level.
If the phone is quickly discharged after replacement, there are two possible reasons:
- 🔋 Failed battery – check the voltage with a multimeter (should be 3.8–4.2V 100% charge).
- 📱 Software glitch – perform resetting via Settings → System system → Resetting settings.
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If a new battery inflates, warms or loses capacity quickly, it is a guarantee. Contact the seller for a replacement within 14 days of purchase (under the Consumer Protection Act).
Frequent battery replacement errors and how to avoid them
Even experienced users sometimes make mistakes that cause their phones to break down, and here are the most common ones:
- 🔨 Metal tools. Metal mediators or screwdrivers can close contacts on the board. Use only plastic or wooden blades.
- 🔥 Overheating the battery when removed. If you heat the battery with a hair dryer longer than 3 minutes, it can ignite.
- 📵 The battery plume must be the last one to be connected when the battery is in place, otherwise the power controller could be damaged.
- 🧲 Ignoring magnetic screws: Redmi 5 Plus uses screws of different lengths, and if you mix them up, you risk damaging the board or the screen.
Another common problem is that the battery is not fully glued, and if the battery is not fixed properly, it can move and tear off the plume when the phone falls, always use double-sided tape from the kit or buy it separately (for example, 3M VHB).
Alternatives to Replacement: How to Prolong the Life of an Old Battery
If you can't afford to replace the battery, you can try to restore the old battery to work, and these methods won't bring back 100% capacity, but they will extend the life of the battery by 3-6 months.
- 🔄 Calibrate the controller. Completely discharge the phone before it turns off, then charge to 100% without interruption. Repeat 3 times.
- ⚡ Use slow charging. Charge your phone from USB-port (0.5A) adapter 5V/1A fast-charging (9V/2A). This reduces battery heat.
- 🌡️ Temperature control: Do not leave your phone in the sun or near heat sources. Optimal operating temperature is 10-35°C.
- 📴 Background activity shutdown. In the battery settings → Charge consumption disable application auto-update and geolocation for unnecessary services.
You can also try resetting to factory settings, sometimes system errors lead to increased charge consumption. Go to Settings → System → Reset and select "Erase all data." Remember to back up!
⚠️ Warning: If the battery is swelling (the phone's cover is up), do not try to resuscitate it. A battery that is uplifted is a risk of fire.