Replacement of the battery on Xiaomi Redmi 5: a detailed guide with photos and nuances

Xiaomi Redmi 5 (codenamed rosy) was released in 2017, but still remains popular due to its balanced performance and affordable price. However, after 5-7 years of operation, even the most reliable battery loses up to 40-60% of capacity, leading to sudden shutdowns, slow charging and overheating. Replacing the battery at the service center will cost 1,500-3000 rubles, but with the tools and patience you can do it yourself - saving time and money.

In this article, we will look at the step-by-step process of replacing, from selecting a new battery to testing after installation, what tools you will need, how to avoid typical errors (such as damage to the display plume), and what to do if the phone does not turn on after assembly, and we will compare original and non-original batteries so that you can choose the best option for the price / quality ratio.

Warning: Disassembling a smartphone voids the warranty (if it still works) and requires care. If you've never repaired an electronics, you better call the professionals. But if you're willing to take the risk, go ahead!

1.How to know if the battery is time to change: 5 key signs

Before you start the screwdriver, make sure that the battery is the problem, and here are the symptoms of critical wear that signal the need to replace:

• 🔋 The phone turns off at 20–30% charge (or even 50%), although the indicator shows the remaining energy.
• ⚡ Charging takes 2-3 times longer than before (for example, from 0 to 100% in 4-5 hours instead of 1.5-2).
• 🔥 The body is noticeably heated during charging or heavy use (games, video).
• 📉 Battery life has been reduced to 2-3 hours in standard use (previously it held 8-10 hours).
• 🔄 The phone spontaneously reboots or turns off when connected to the charger.

If you know 2-3 items on the list, the probability of battery wear is close to 99%. For accurate diagnostics, you can use applications like AccuBattery (available on Google Play), which show the real capacity of the battery. For example, if the original capacity of Redmi 5 is 3300 mAh, and the application shows 1500-2000 mAh, it is definitely time to change the battery.

Note: Sometimes similar symptoms cause software crashes (for example, after an update) MIUI) Or damage to the power controller. To rule out these options, try:

1. Reset the settings to factory (Settings → Additional → Recovery and Reset).
2. Swipe your phone through Fastboot (if you have experience).
3. Check the charger and cable (use an original or certified USB-Type-C).

2. Battery selection: original vs non-original

The quality of the battery not only affects the life of the phone, but also its safety. Cheap, non-original batteries can swell, overheat or even ignite.

Our advice is that licensed batteries from trusted suppliers (such as Battery King or Repair Universe) are certified and often come with a power controller similar to the original.

• 🔍 Capacity: must be at least 3300 mAh (like the original).
• 📦 Package: the set must have adhesive strips for fixation.
• 📝 Guarantee: Minimum 6 months.
• 🔧 Reviews: check the seller's ratings on AliExpress, Wildberries or Yandex.Market.

💡

Before you buy, ask the seller to send you a photo of the battery with the date of production (printed on the label). Fresh batteries (2023-2026) will last longer than those released 2-3 years ago.

Avoid batteries without labeling or with a suspiciously low price (below 500) ₽). Also, we do not recommend buying batteries with a capacity higher than the original (for example, 4000 mAh or 5000 mAh) - they may not fit into the case or overheat due to incompatibility with the power controller Redmi 5.

3. Tools required: full checklist

To replace the Xiaomi Redmi 5 battery, you will need:

Why these tools?

• 🔧 Screwdriver. PH00 — screws in Redmi 5 small, the usual cross can rip off the slits.
• 🧲 Magnetic tweezers will help to carefully remove small details (for example, plumes).
• 🔥 The dryer is used to soften the adhesive that the battery uses to glue to the body. The optimum temperature is 60-80.°C.
• 🧴 Isopropyl alcohol will remove the residue of glue and degrease the surface before installing a new battery.

If you don't have a hair dryer, you can use hot water in a bag (put your phone in a sealed bag of warm water for 5-10 minutes) or leave the device in the sun/battery for 15-20 minutes.

Also prepare the workplace:

• 📍 Work on a flat, clean surface (it is better to cover the table with paper or cloth).
• 🔌 Turn off your phone and drain the battery (up to 0%) – this minimizes the risk of short circuit.
• 📱 Take it down. SIM-card and memory card, so as not to lose them during disassembly.

4. Step-by-step disassembly of Xiaomi Redmi 5

Now, to the most critical part of the process, which is disassembling the phone, follow the instructions in strict order to avoid damaging the plumes or the board.

Step 1 Remove the back cover

The Redmi 5 back is mounted on the latches and glue to remove it.

1. Heat the edges of the phone with a hair dryer (keep it 5-10 cm away so as not to melt the plastic).
2. Place the suction cup on the bottom of the screen (near the USB-Type-C connector) and pull slightly.
3. In the resulting gap insert a plastic spatula and carefully conduct it around the perimeter, snapping the clamps.

💡

Don't put too much effort -- if the lid doesn't lend itself, warm up the glue again. Too much pressure can crack the glass or damage the fingerprint plume.

Step 2. Shutting down the battery

When you take the lid off, you'll see the battery locked in a black film, and the first thing you do is you disconnect the battery from the motherboard, or you'll run the risk of shorting it.

1. Find the battery connector (usually located at the top of the board, next to the camera).
2. Carefully tuck the connector with a plastic spatula and disconnect it.

Step 3: Remove the old battery

The battery is glued to the body, so it must be carefully "steamed":

1. Warm up the battery with a hair dryer again (temperature 70-80)°C).
2. Pick up the battery with a plastic spatula from any corner and slowly pull up.
3. If the battery fails, add a little isopropyl alcohol under it - this will dissolve the glue.

⚠️ Attention: if the battery is swelling, do not pierce it and do not bend it. The swelling batteries can emit toxic gases or ignite.

Step 4: Installation of a new battery

Before installing the new battery:

1. Remove the remnants of old glue from the case (use alcohol and a napkin).
2. Remove the protective film from the new battery and glue it to the old one.
3. Connect the battery connector to the motherboard.

Make sure the battery is flat, without skewing. If the kit comes with adhesive strips, stick them around the edges for additional fixation.

5. Build the phone and first turn on

After replacing the battery, collect the phone in reverse order:

1. Install the back cover by snapping all clips around the perimeter.
2. So, do not let the snails go away (not to be slapped).
3. Put it in. SIM-memory-card.

Now the most exciting thing is the first turn on. Connect your phone to the charger and observe:

• 🔋 If the charging indicator appears on the screen, the battery is connected correctly.
• 🔄 If the phone is not responding, check it:

If the phone is turned on but discharges quickly, it is possible:

• 🔌 The battery is not calibrated (you need to completely discharge and charge 2-3 times).
• 🔧 The power controller does not recognize the new battery (will help reset settings).
• 📉 New battery defective (return it to the seller under warranty).

💡

After you change the battery, recalibrate it: fully discharge the phone before you turn it off, then charge it to 100% without interruption, repeat the procedure 2-3 times, which will help the power controller determine the level of charge more accurately.

6. Common mistakes and how to avoid them

Even experienced craftsmen sometimes make mistakes when replacing batteries, and here are the most common problems and ways to prevent them:

If the phone doesn't turn on after assembly, don't panic.

• 🔌 Not connected to the battery connector → Disassemble the phone and check the connector.
• 🔧 Power plume damaged. → We need a soldering station for repairs.
• 📱 Firmware came off. → Try to go to Fastboot (click Power). + Vol Down and flash your phone through the Mi Flash Tool.

⚠️ Note: if after the battery is replaced, the phone turns on but does not charge, the problem may be in the power controller (chip on the board.

7.Recycling an Old Battery: Why It Matters

Don't throw old batteries into the trash! Lithium-ion batteries contain toxic substances (cobalt, nickel, lithium) that pollute the environment, and a damaged battery can ignite in a landfill.

How to properly dispose of:

• 🏙️ Hand over to the points of reception of electronics (for example, "Ecotechnologies", "MegaFon", "Svyaznoy").
• 🔄 Some service centers accept old batteries for free (even without buying a new one).
• 📦 If the battery is swollen, do not store it at home - put in a sealed container and as soon as possible hand over for disposal.

In Moscow, St. Petersburg and other major cities, special eco-mobiles for the collection of hazardous waste are working, and you can find out their schedules on the local administration website or through the Yandex.Maps service (search on request "battery reception point").

FAQ: Frequent questions about replacing the Redmi battery 5