Xiaomi Mi 5S
Mi 5S
Many people are afraid to disassemble their smartphone for fear of damaging fragile plumes or losing warranty (although this is no longer relevant for an 8-year-old model). In fact, you can replace the battery with the Xiaomi Mi 5S at home - the main thing is to follow the instructions and use the right tools. In this article, we will discuss the entire process in detail: from choosing a new battery to assembling the device, and also tell you how to avoid typical errors.
Signs that Xiaomi Mi 5S battery needs replacement
How do you know that the problem is the battery, not the software failure or damage to the charger?
- 🔋 Phone's running out of power. 2-3 hours with moderate use (social networks, instant messengers).
- 📉 The percentage of charge “jumps” (for example, from 40% immediately drops to 15%) or shows incorrect values.
- 🔌 The device turns off when connected to charging or refuses to turn on without connecting to the network.
- 🔥 Battery heats up strongly during charging or operation (normal: light heat that does not burn your hand).
- ⚡ The phone is charged only in a certain position of the cable or when pressing the body.
If you know at least 2-3 of the items on the list, the battery probably has run out of life. For accurate diagnostics, you can use applications like AccuBattery (showing real capacity) or AIDA64 (showing the number of charging cycles), Normal wear for lithium-polymer batteries is a loss of 20-30% of capacity after 500-800 cycles.
⚠️ Note: If the phone suddenly turns off 30-50% If you're charging, it could be a sign of not only battery wear, but also damage to the power controller, and if you're not, you might not be able to replace the battery, you might need to have a card diagnosis.
What battery to choose for Xiaomi Mi 5S: original vs analogues
The original battery for the Mi 5S is marked BM43 (or DM43 in some batches) and a nominal capacity of 3200 mAh. However, it is almost impossible to find a new original battery from Xiaomi today - the market is mainly represented by analogues.
| Parameter | Original battery | Quality analogue | Cheap analogue |
|---|---|---|---|
| Capacity | 3200 mAh | 3200-3500 mAh | 2800–3000 mAh (inflated data) |
| Term of service | 500-800 cycles | 400-600 cycles | 200-300 cycles |
| Price (2026) | No, not on sale. | 1500–2500 ₽ | 800–1200 ₽ |
| Guarantee | — | 6–12 months | 1–3 months (or absent) |
Recommended analogue manufacturers:
- 🔝 ZOP Power - high build quality, capacity corresponds to the declared.
- 🔝 Baseus – reliable batteries with overheating protection.
- 💰 Remax - budget option, but with the risk of rapid wear.
Before buying, check:
Availability of a quality certificate (e.g. CE, RoHS)
Coincidence of the connector and size with the original
Customer reviews about a particular model
Guarantee card (minimum 6 months)
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⚠️ Warning: Batteries with a capacity of over 3,500 mAh for Mi 5S — It's a marketing hoax, because the phone doesn't physically fit a larger battery, and the "enhanced" capacity is achieved by using low-quality components.
Preparing for replacement: security tools and measures
To replace the battery with Xiaomi Mi 5S, you will need:
- 🔧 Screwdriver kit: cross-haired (PH00) and flat (1.5 mm) for the screws of the body, as well as five-pointed (Y00) plume.
- 🧲 Suction - to remove the back cover (can be replaced with a thin plastic card).
- 🔥 Dryer or thermo-air station - to soften the glue under the battery.
- 🩹 Plastic mediator (or guitar mediator) – to jeopardise the battery.
- 🧴 Isopropyl alcohol (90%+) — glue-residue.
- 🔌 Antistatic bracelet (optional) – protection against static electricity.
Also prepare the workplace:
- 📱 Work on a table with good lighting (better to use a table lamp).
- 🧹 Remove all small items – cogs are easily lost.
- 📸 Take pictures of each stage of the dismantling so as not to confuse the details during the assembly.
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Before starting work, completely discharge the phone (before automatic shutdown) - this minimizes the risk of short circuit when disconnecting the battery.
If you don’t have experience disassembling smartphones, practice on an unnecessary device or watch video instructions. For example, Xiaomi Repair’s YouTube channel offers detailed videos on replacing the battery with the Mi 5S.
Step-by-step: how to replace the battery on Xiaomi Mi 5S
We're going to take the most critical step, and follow the instructions carefully, and any wrong move could damage the plumes or the motherboard.
Step 1: Removing the back cover
1. Turn off the phone and remove the tray for SIM-map.
2. heat the hair dryer edge of the back cover (temperature ~60 ° C) for 1-2 minutes - this will soften the glue.
3. Tap the lid with a plastic card or suction cup starting at the bottom edge (near the Type-C connector).
4. Carefully drive the map around the perimeter, separating the lid. Be careful - under the lid are the plumes of the fingerprint scanner and antenna contacts!
Step 2: Disconnecting the plumes
1 Unscrew 10 screws that fix the metal plate (use the PH00 cross screwdriver).
2. Remove the plate and disconnect the plumes in the following order:
- 📱 Battery plume (black connector next to the motherboard).
- 👆 Fingerprint scanner plume (white connector).
- 📶 The antenna plume (may be glued - gently dent).
3 Unscrew the two screws holding the metal plate over the motherboard and remove it.
Step 3: Remove the old battery
1. heat the battery with a hair dryer (not higher than 70 ° C!) for 3-5 minutes - this will soften the glue.
2. Carefully tuck the battery with a plastic mediator on either side. Do not use metal tools - risk puncture!
3 If the battery doesn't respond, put the isopropyl alcohol under it, it will dissolve the glue. Repeat the smearing.
4. Remove the battery and clean the seat of glue residues with a napkin soaked in alcohol.
Step 4: Installation of a new battery
1. Remove the protective film from the new battery (if any).
2. glue bilateral tape (usually included) to the back of the battery.
3. Set the battery in the seat and press tightly.
4. Connect the battery plume to the motherboard.
Step 5: Assembly of the phone
1. Return the metal plates to place and twist the screws (do not pull!).
2. Connect the plumes in reverse order: antenna → fingerprint scanner → battery.
3. Set the back cover, starting at the top edge. Press it around the perimeter for a secure fixation.
4. Put the tray in. SIM-card and turn on the phone.
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After replacing the battery, be sure to perform 2-3 full charge/discharge cycles (from 0% to 100%) – this calibrates the power controller and prolongs the life of the new battery.
Common Mistakes and How to Avoid Them
Even experienced tycoons sometimes make mistakes when replacing a battery, and here are the most common ones and ways to prevent them:
- ❌ The fingerprint scanner plume is damaged when the back cover is untidy. Solution: Use a thin plastic card and don't put too much effort into it.
- ❌ Overheating the battery with a hairdryer - can cause bloating or fire. Solution: Keep the hairdryer at a distance. 10-15 cc and do not heat up any longer 5 minute.
- ❌ Using superglue instead of double-sided tape will make it harder to replace the next one. Solution: Use only the original glue or scotch from the kit.
- ❌ Incorrect connection of the plumes - the phone will not turn on or there will be glitch with the sensor.
If the phone is not switched on after replacement:
- Check if the battery is tightly connected.
- Make sure all screws are twisted (unpatched screws can close the contacts).
- Connect your phone to charge for 10-15 minutes – sometimes a new battery needs to be “waked up.”
⚠️ Warning: If the battery is rapidly discharged after replacement (e.g., with a 100% before 0% post 1-2 You probably bought a fake with an understated capacity. Return the battery to the seller and demand a replacement or refund.
What to do after replacement: Calibration and care
The new battery requires the right run-in to last as long as possible.
- 🔄 Calibration: Perform 2-3 full charge/discharge cycle (from 0% before 100%). This will help the power controller to accurately determine the capacity.
- 🔌 Charging: Use an original or certified RAM (5V/2A). Avoid “fast” charging with higher power 18W — They reduce the battery life.
- 🌡️ Temperature: Do not leave your phone in the sun or near heat sources. The optimum operating temperature is 10-35.°C.
- 📴 Storage: If you don’t use your phone for long, keep it charged. 40-50% cool-place.
Also install a battery monitoring app, such as:
- AccuBattery - shows real capacity and wear.
- Battery Guru – monitors temperature and voltage.
- AIDA64 provides detailed information on the number of charging cycles.