Smartphones series Redmi from Xiaomi have earned a reputation for reliable devices, but even the highest quality lithium-ion battery over time loses its capacity. If your Xiaomi Redmi 7 began to quickly discharge, turn off 20-30% charge or swell the body, it's time to think about replacing the battery. Self-repair allows you to save a significant amount and extend the life of the gadget for another couple of years.
The replacement process requires precision and understanding of modern monoblocks. Unlike older phones with removable covers, you will have to work with adhesive joints and plumes. Careful study of the instructions before starting work minimizes the risks of damage to the display or other components.
Before you start disassembling, make sure you have all the tools you need at hand. Lack of specialized equipment can make a simple process a complex problem. We'll look at all the steps from preparation to initial launch.
Diagnostics and selection of a new battery
The first step is to make an accurate diagnosis of the current battery. It's not always a quick discharge that means a physical deterioration in the chemistry of the cell. Sometimes the problem is software failures or background processes. However, if the phone body is deformed or the battery is bloated, you can't delay.
When choosing a new battery for the Redmi 7 (model BN47), it is critical to pay attention to labeling and capacity.The original batteries have a capacity of 4,000 mAh. The market is crowded with copies that may have less real capacity or poor build quality.
- 🔋 Look for the markings. BN47 On the battery sticker, this ensures compatibility.
- 🔋 Pay attention to the presence of holograms and QR-manufacturer's codes on packaging.
- 🔋 Avoid batteries without a protective control board (BMS) bottom-case.
⚠️ Attention: Using cheap analogues without protection can lead to overheating of the device or even fire.
Checking the status through the software will also be useful. You can use the engineering menu or third-party utilities to assess wear. Enter the code ##6485## in the Phone app to view the statistics.
Tools and training required
A good battery replacement is impossible without the right tools. Attempting to open the case with a knife or (bank card) often damages the frames and screen. To work with Xiaomi, you will need a set of precision tools.
The main challenge is the adhesive connection of the back cover and the frame, which requires heating to soften, and the use of an open flame is strictly prohibited, as this will damage the display and internal components.
- 🔧 Hair dryer (construction or household) or heating platform for softening glue.
- 🔧 Set of screwdrivers (cross-crosses) PH000 and PH00, flat).
- 🔧 Plastic blades (mediators) and suction cup for neat opening.
You'll also need tweezers to handle fine plumes and preferably isopropyl alcohol to clean surfaces. Be sure to turn off your smartphone before you start work, a basic electrical safety rule that can lead to short circuits if you ignore it.
☑️ Preparation of the workplace
Rear cover removal process
The most critical stage where breakdowns happen most often is to remove the back.Redmi glass cover 7 It's glued around the perimeter, and it heats the edges of the device evenly to temperature. 60-70 Celsius will make the glue plastic.
Don't heat one point too long so as not to damage the display matrix on the back. The movements must be circular. Once heated, the suction cup is placed at the bottom of the case, and a small gap is created.
A plastic blade is carefully inserted into the gap, and you can use the tool along the perimeter, cutting the adhesive layer, and you can't use metal tools here, because you can damage the plumes that go under the frame.
⚠️ Warning: If the lid fails, don't use force. Add a little more heat. A sharp jerk can crack the glass of the back panel.
Once all sides are removed, the lid is easily removed, and underneath it you'll see a plastic frame covering the main components, and it's also attached to screws and latches.