How to get the battery from the phone Xiaomi Redmi 4A

Owners of Xiaomi smartphones often face a situation when the device stops holding a charge or turns on only from the network. Model Redmi 4A, despite its reliability, is not without the typical problems of lithium batteries, which eventually degrade. Self-replacement of the battery allows you to save significant money and extend the life of the gadget, but requires accuracy and understanding of the device of modern smartphones.

The battery recovery process in this model has its own characteristics related to the design of the housing and the location of the plumes. Incorrect actions can lead to damage to the display or battery bloating, so it is important to strictly follow the sequence of operations. In this article, we will discuss in detail each stage of dismantling, from the preparation of tools to the final test of the system’s health.

Before you start disassembling, you need to understand the risks: the internal components of the Redmi 4A are quite tightly positioned, and the battery is accessed through the back cover, which is attached to the latches. Any careless movement can violate the integrity of the plastic mounts. The main danger when removed is the risk of puncturing the bloated battery with a sharp object, which can cause fire.

Tools and workplace preparation required

To do this successfully, you will need a minimum set of specialized tools that you can buy from any electronics store. The main task is to carefully open the case without damaging the plastic. You will need: a suction cup to lift the lid, a plastic spatula (mediator), a thin metal blade or scalpel, and a cross screwdriver of the size of PH00.

The organization of the workspace is critical: the surface of the table should be clean, flat and well-lit. It is recommended to use a magnetic mat or a container with cells for sorting screws, since Redmi 4A uses fasteners of different lengths. Losing even one small screw can lead to rattling of the case during operation.

Safety is priority number one. Before any work begins, you should completely turn off your smartphone. If the device does not respond to the power button, you should wait for the battery to completely discharge, although if you replace it, you should do this with antistatic gloves or regularly touch a grounded metal object to relieve static stress from the body.

⚠️ Warning: Never use metal tools to snap the lid near display plumes or buttons, as this is guaranteed to short or break contacts.

Diagnostics of battery status before autopsy

Before disassembling the phone, make sure that the problem lies in the battery. Often users confuse battery wear with software failures or a malfunction of the power controller. Check the usage statistics in the Settings → Battery menu. If the discharge schedule shows sharp percentage spikes or the phone turns off at 20-30% charge, a replacement is inevitable.

Visual inspection also provides a lot of information: If the Redmi 4A back cover spontaneously flies away or a gap appears between the body and the screen, it's a sure sign of battery bloating. The billowing battery puts pressure on the internal components, which can damage the display or tear off the plumes, in which case you can't pull with replacement.

There's a software method for checking charging cycles, but it's hidden from the user in the MIUI shell. You can use the engineering menu by typing ##6484##. In the Battery info section, you can see the current voltage and status. If the status shows Bad or the voltage under load drops below 3.4V, the power cell has run out.

Removal of the Redmi 4A Rear Cover

Model Redmi 4A It has a removable back cover, which makes it much easier to access the insides than a monoblock, but plastic latches lose elasticity over time and can break if you handle it sloppy. Start by turning the device off and retrieving it. SIM-memory-cards.

Use a suction cup to create a small gap between the lid and the frame at the bottom of the phone, closer to the charging connector. If there is no suction cup, you can gently tuck the lid with a thin blade, preheating the edge with a hair dryer to a temperature of 40-50 degrees. The heat makes the plastic more flexible and reduces the risk of cracks.

Once the gap is formed, insert a plastic blade and guide it along the perimeter of the body, sequentially snapping the locks. The movements should be sliding, not lever, so as not to break the plastic whiskers. Pay special attention to the areas around the camera and speakers where the latches sit particularly tightly.

⚠️ Note: Do not try to open the lid from the upper end in the first place, there are plumes that can accidentally touch and damage if you careless jerk.

💡

If the lid is very tight, don't use force. Warm up the body perimeter with a hairdryer for 30-40 seconds, this will soften the glue and plastic of the latches.

Dismantling the protective plate and disconnecting the plumes

When you take the lid off, you'll see the inside of the smartphone, and at the bottom, closing the battery contacts and the connectors, you'll have a metal plate that's screwed up with a few screws, and you'll need a PH00 cross screwdriver to remove it.

Unscrew all the visible screws holding the plate. It's important to remember their location, because they can vary in length. Once you remove the plate, you get access to the battery connector and the display plume. The first thing you need to do is turn off the battery.

Use a plastic blade or nail to gently squeeze the battery connector up. Never use metal tools for this operation, as short circuiting the contacts can disable the motherboard's power controller. Once the battery is turned off, the smartphone will completely power down.

Removing the old battery and installing a new one

In the Redmi 4A, the battery is not glued to the body, but only tightly inserted into a niche, sometimes with a slight fixation with double-sided tape. If the battery does not swell, it should be removed relatively easily. In the case of bloating, the power cell can be strongly pressed against the frame or screen.

You can use a suction cup to extract it, or you can gently tuck the edge of the battery with a plastic card. If the battery is held on glue, slightly warm the back of the case (without the lid already) with a hairdryer to soften the adhesive base. You need to pull smoothly, without jerks, controlling the position of the element.

Install the new battery in reverse order. Make sure that the contacts of the new BM20 battery (original model) or its quality counterpart match the connector on the board. Insert the battery to the end, then plug the plume until the characteristic click.

Device assembly and initial start

When you plug in a new battery, don't rush to close the lid right away. First, check the system's performance. Connect the charger and make sure the charger catches fire. If the phone responds to charging, you can try to turn it on.

Press and hold the power button. If the MI logo appears on the screen, it's a good connection. Let the phone charge to 100% before it's fully operational. Calibration of the charge controller occurs in the first discharge-charge cycle.

Once you're satisfied, put a metal plate in place and twist all the screws. Make sure no plume is squeezed. Then gently snap the back cover around the perimeter, starting at the top and ending at the bottom.

Frequently Asked Questions (FAQ)

💡

Self-replacement of the battery in the Redmi 4A is a real money saver, but requires attention to detail and safety when working with lithium cells.