Xiaomi Redmi 5A Prime, released a few years ago, is still a popular device due to its reliability and availability. However, time does not spare lithium-ion batteries, and over time, even the highest quality gadget begins to discharge faster than it charges. If your device stops holding charge after lunch or turns off at 20% of the battery, this is a sure sign that the resource of the chemical source of current is exhausted.
Instead of buying a new device, many users decide to replace the battery themselves, not only saving money, but also restoring the phone to its former autonomy. In this article, we will discuss in detail the process of selecting components, preparing the workplace and step-by-step instructions for dismantling the old battery and installing a new one in the Redmi 5A Prime model.
It's worth noting that the process requires precision and minimal technical skills. The Redmi 5A Prime has a non-removable back cover, which makes it difficult to access the insides compared to the older Redmi models. However, using the right tools and following the algorithm, you can successfully complete the repair at home without going to the service center.
Diagnostics and selection of a new battery
Before you start disassembling, you need to make sure that the problem lies in the physical degradation of the battery, and not in software failures or wear of the charge controller. Often users confuse the software "glitch" with the real breakdown. Check the usage statistics in the section Settings → Battery. If the discharge graph shows sharp jumps or the phone turns off in the cold, most likely, the chemical composition of the element does not hold the voltage.
The choice of a new battery is a critical stage. The market is full of fakes that can not only quickly fail, but also damage the motherboard. The original battery for the Xiaomi Redmi 5A Prime is usually marked with the code BM47. When buying, pay attention to the capacity, which should be 3000 mAh (nominal) or 3080 mAh (typical).
Visual inspection is also important, because a bloated battery is not just a sign of wear, it's a direct safety hazard, and it's a sign that the inside of the enclosure is undergoing irreversible chemical reactions that emit gas, and it's strictly forbidden to use such a device to make calls or to keep it in your pocket.
When choosing a supplier, consider the following criteria:
- 🔋 The presence of a hologram and QR-code for verification on the official website of the manufacturer.
- 📦 Packaging quality: Original batteries are often shipped in sealed bags with protective stickers on the contacts.
- ⚖️ Cell weight: A battery that is too light may indicate the use of cheap, low-energy-density materials.
⚠️ Warning: Never buy batteries without protective film on the contacts. Open contacts can oxidize during storage or cause short circuit during transportation, making a new part unusable.
Tools and workplace preparation required
You can't do a good job without the right tools. Trying to open the Redmi 5A Prime with a knife or a screwdriver often causes plastic chips and damage to the plumes. You'll need a specialty kit to open the cases of smartphones. The main tool will be a thin plastic blade or mediator that doesn't conduct current or scratch plastic as hard as metal.
To unscrew the screws, you'll need a small cross screwdriver, usually the size of a PH00 or PH000. The screws in Xiaomi are very small, and using a large screwdriver can rip off the hats, which will create additional problems when you build. Also, be sure to prepare tweezers with curved edges, which will help you carefully remove the battery without damaging it with a sharp tool.
Special attention should be paid to the organization of the workspace. The surface should be clean, dry and well lit. Small screws are easily lost, so it is recommended to use a magnetic mat or arrange the parts in the order of their dismantling, this will help to avoid a situation where after assembly there are "extra" parts.
The core set of tools includes:
- 🔧 Plastic spatula (spudger) to open the body.
- 🔩 A set of micro-screwdrivers (cross and flat).
- 🌡️ A dryer or warmer for softening the glue (temperature not higher) 80-90°C).
- 🧲 Magnetic holder or propeller container.
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Use a suction cup to carefully pull back the cover after warming up, this will reduce the risk of cracks on the plastic.
The process of disassembling the case Xiaomi Redmi 5A Prime
The first step in the repair procedure is to turn the device off completely. Don't ignore this rule, as accidentally closing the contacts under voltage can cause the power controller to burn. SIM-cards and memory cards to allow access to one of the hidden screws.
Redmi back cover 5A Prime is attached to a two-piece glue and several screws. One screw is under the tray. SIM-The rest are hidden under a decorative pad at the bottom or directly under the frame. To soften the adhesive, you need to warm up the perimeter of the case evenly. Use a hair dryer while holding it at a distance. 5-7 cm from the surface and warm about 2-3 minute.
After warming up, insert a plastic blade into the junction between the back cover and the frame. Move slowly, sliding along the perimeter. Don't try to bend the lid right away -- the glue should move out evenly. If you feel strong resistance, stop pulling and warm up the area again.
The main stages of dismantling:
- Twisted a visible screw in a niche SIM-map.
- Warm up the body and gently disconnect the back cover around the perimeter.
- Remove the plastic frame-layer if it interferes with access to the plumes.
- Unscrew all screws that fix the plastic protection of the motherboard.
Difficulty removing the lid
Disconnecting plumes and removing the old battery
Once you remove the plastic panel, you'll have access to the main components: the motherboard, the main camera module, and the battery connector. The first thing you need to do is turn off the battery plume, and you need to do this very carefully, using a plastic blade or nail, but not a metal screwdriver.
The display plume and touchscreen can also interfere with full battery access, as it is glued to the middle frame in this model. Some Xiaomi modifications require you to unscrew additional screws around the connectors. Remember the location of each screw, as they may differ in length.
The hardest part is removing the battery, it's attached to a double-sided tape, and you should never try to tamper with a metal object by breaking through the body, and it can cause lithium to burn, and you should use a plastic card or a special tape, holding it under the battery.
To facilitate the process, you can warm up the battery area with a hair dryer again slightly (no more than 1-2 minutes) to soften the glue. Pull carefully, controlling the force. If the battery is deformed, act with double caution so that the electrolyte does not get on the skin or eyes.
| Parameter | Meaning/Description | Importance |
|---|---|---|
| Model battery model | BM47 | High (compatibility) |
| Capacity | 3,000 mAh | Average (working hours) |
| Type of connection | The plume (FPC) | High (mounting) |
| Firming | Double-sided scotch | Medium (fixation) |
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The main rule of extraction is not to damage the battery shell with sharp objects to avoid fire or chemical burn.
Installation of a new power supply and assembly
Before installing a new battery, you need to clear the seat of the old glue residue. Use a soft cloth soaked in isopropyl alcohol to degrease the surface. This will ensure that the new battery is securely fixed. If you have a new Scotch pack, use it; if not, you can use a B-7000 universal glue.
Connect the battery plume to the motherboard before you click, make sure the connector is flat and tight, and then you can do a pre-check, without sticking the battery or closing the case, press the power button, and if the phone responds and shows charging, the replacement is successful.
When you build, you'll need to reverse the order. You'll need to stack the plumes carefully so they don't get framed. You'll need to tighten all the screws, but don't drag them over -- the plastic of the threaded holes in cheap Xiaomi models can easily burst. You can evenly spread the adhesive around the perimeter of the back cover before you install it.
Checklist before the final seal:
- ✅ Battery plume connected to the stop.
- ✅ Touchscreen and display cable undamaged and connected.
- ✅ All screws of the protective panel are twisted.
- ✅ Tray SIM-mapping.
⚠️ Warning: Before applying the glue, be sure to check the touchscreen and speaker. Once the cover is glued, it will be extremely difficult to correct the error without reheating and disassembling.
First start and calibration of the battery
After successful smartphone assembly, you need to correctly conduct the first charge cycle, which will help the power controller correctly determine the real capacity of the new battery, insert the charger and turn on the phone. Even if the indicator is 100%, it is recommended to leave the device on charge for another 1-2 hours.
Modern Xiaomi smartphones are equipped with a MIUI system that automatically calibrates the battery in the background. However, to achieve maximum effect, you can perform manual calibration. To do this, completely discharge the phone before turning it off, then charge it to 100% when turned off.
In the first days of use, watch the heating of the case. Easy heat generation in the processor area is normal, but if it is the battery area that is warming, this may indicate a defect or problems with the controller. Also monitor the discharge rate in standby mode.
Recommendations for the operation of the new battery:
- Avoid zero-to-zero in everyday use.
- Do not leave your phone on charge all night long, although the controller must cut off the current.
- Use original or certified 5V/2A chargers.