Xiaomi Redmi 3
Redmi 3
Replacing the battery on Xiaomi Redmi 3 is a medium-sized task that requires care, patience and a minimal set of tools. Unlike modern smartphones with adhesive batteries, Redmi 3 is relatively easy to understand, but there are nuances: brittle plumes, thin connectors and the risk of damage to the rear cover. In this article, we will discuss the entire process from A to Z – from choosing a new battery to final assembly, and also explain how to avoid typical errors.
If you've never taken a smartphone apart before, don't worry: with the right approach, even a beginner can do it in 30-40 minutes, the main thing is to follow the instructions and take your time, and for those who are doubtful about their abilities, we will tell you how much it will cost to replace the service center and how to check the quality of the work of the masters.
Signs of battery wear on Xiaomi Redmi 3
How do you know if your Redmi 3 battery really needs to be replaced, not just discharged? Here are the key symptoms that signal critical battery wear:
- 🔋 The phone discharges in 2-3 hours with moderate use (social networks, instant messengers).
- 🔌 Charging jumps: for example, from 50% immediately drops to 15%, or the phone turns off at 20-30% charge.
- 🔥 The battery swelled - this is noticeable by the deformation of the back cover or screen (sometimes the smartphone begins to "play" when pressing the display).
- ⚡ The phone overheats while charging or running, even if heavy apps aren't running.
- 🛑 The device refuses to turn on, although charging lasted several hours.
The last point is especially dangerous: if the Redmi 3 does not respond to the power button and does not charge, this can mean not only battery wear, but also damage to the power controller.
Important! A bloated battery is not only a risk of damage to your smartphone, it is a direct security threat. Lithium-ion batteries can ignite or explode when deformed. If you notice bloating, don't try to charge your phone and immediately disconnect it from the grid.
What battery to choose for Xiaomi Redmi 3
The original Xiaomi Redmi 3 battery is BM47-marked and has a capacity of 4100 mAh. However, there are dozens of analogues on the market, and not all of them are of equal quality.
- 🔍 Capacity: optimally - 4000-4200 mAh Batteries with declared 5000+ mAh are often fakes with a real capacity of 2500-3000 mAh.
- 🏷️ Marking: must match the original (BM47 Or Xiaomi Redmi 3. Check for hologram and factory stickers.
- 📦 Package: The set must have contacts to connect the plume (sometimes sold separately).
- 💰 Price: the original battery costs 800-1200 rubles, quality analogues - 500-800 rubles. Too cheap (up to 300 rubles) - most likely marriage.
Where to buy? Best options:
- Xiaomi’s official service centers are a guarantee of the original battery, but the price is higher.
- Verified online stores (e.g. AliExpress with a seller rating above 98%, Beru, Wildberries) Look for reviews with photos of real buyers.
- Local parts stores – you can touch the goods before buying, but the risk of running into a fake is higher.
⚠️ Before buying, check if the new battery supports fast charging (if your Redmi 3 supported it).Some cheap ones are not compatible with Quick Charge technology, which will charge the phone 2-3 times longer.
| Characteristics | Original battery | Quality analogue | Fake (low quality) |
|---|---|---|---|
| Capacity | 4100 mAh | 4000-4200 mAh | 2500–3000 mAh (stated 5000+) |
| Tension. | 3.85 In | 3.8–3.85 In | 3.7 B or not indicated |
| Weight. | ~50g | 45-50 g | 30–40g (too light) |
| Guarantee | 6–12 months | 3–6 months | Absent. |
Battery replacement tools
To disassemble the Xiaomi Redmi 3 and replace the battery, you will need:
- 🔧 Plastic blades (2-3 pieces) - for careful lid slinging and disconnection of plumes.
- ⚒️ Cross screwdriver (size) PH00 or PH0) — screw-off.
- 🧲 Magnetic mat or container – to avoid losing small details.
- 🔥 Hair dryer or thermo-air station - to soften the glue (if the battery is glued).
- 🧴 Isopropyl alcohol (90%+) — Cleaning contacts and removing glue residues.
- 📏 Tweezers - to work with small plumes.
Also, prepare your workplace: a table with good lighting, no carpets (so you don't lose your cogs), and minimal foreign objects, and if you don't have experience, you can practice on an old, unnecessary phone.
⚠️ Attention! Do not use metal blades or knives to lid the lid, they can damage plastic latches or plumes. Also avoid too much heat with a hairdryer: temperature above 60°C can warp plastic or damage the screen.
Turn off the phone and remove it SIM-map|Charge the battery to 30-50% (do not charge the bloated battery!)|Prepare all tools and workplace|Take a picture of the location of the plumes before disconnecting-->
Step-by-step instructions for replacing the battery
Now, the most important step is to disassemble the smartphone and install a new battery.
- Turn off the phone and remove the tray for SIM-If the battery is swelling, don't turn on the device!
- Heat the back cover with a hair dryer (50–60°C) for 1-2 minutes to soften the glue. Keep the hair dryer at a distance of 10–15 cm.
- Put the lid on a plastic blade, starting at the bottom corner (near the charging socket). Carefully drive the shoulder blade around the perimeter until the lid is detached.
- Unscrew 8 screws with a cross screwdriver (they fix the metal plate covering the battery).
- Unplug the battery plume, it's under a black insulation tape, tweez it with tweezers, and gently unplug the connector.
- Remove the old battery. If it's glued, put a plastic spatula on it and pull it up, and use isopropyl alcohol if necessary to remove the glue residue.
- Install a new battery, plug in the plume and assemble the phone in reverse order.
Important nuances:
- 🔌 Don't pull the plumes, they're very fragile, you'd better stick the connector on the side.
- 🔋 If the new battery doesn’t fit tightly, check if there’s any protective film left under it.
- 🔧 Screw the screws cross-cross to avoid plate distortions.
What if the phone doesn’t turn on after replacement?
Common Mistakes and How to Avoid Them
Even experienced tycoons sometimes make mistakes when replacing a battery, and here are the most common problems and ways to prevent them:
- 💥 Screen plume damage -- occurs when you push too hard on the shoulder blade when you slap the lid. Solution: Use a thin plastic card and move slowly.
- 🔥 Battery overheating when soldering (if you solder contacts) Solution: Use a soldering iron with a power of no more than 30 watts and work with short tangent movements.
- 🔌 Short circuit due to metal sawdust or solder drops on the board. Solution: work in a clean room and use an antistatic bracelet.
- 📉 Fast discharge of the new battery solution: check the voltage with a multimeter before installation (should be 3.7-3.85 V).
If the phone is worse off than the old battery after the replacement, you may have run into a fake battery, in which case return the battery to the seller (if there is a warranty) or buy a new one from a trusted supplier.
💡
Before you first charge your new battery, fully discharge it before you turn off your phone, then charge it to 100% without interruption, which will help calibrate the charge controller and extend battery life.
How much does it cost to replace the battery in the service
If you are not sure about your abilities, you can contact the service center. The cost of replacing the battery with the Xiaomi Redmi 3 varies depending on the region and type of workshop:
| Type of service | Cost of work (ruble) | Cost of battery (ruble) | Total (rupe) |
|---|---|---|---|
| Official Xiaomi service | 800–1200 | 1000-1500 (original) | 1800–2700 |
| Local workshop | 500–800 | 500–1000 (analogue) | 1000–1800 |
| Self-sustaining replacement | 0 | 500–1200 | 500–1200 |
If you need a warranty (usually 6-12 months for work and parts), then yes. In local workshops, the price is lower, but the quality of the batteries and the professionalism of the craftsmen can vary. If you replace them yourself, you save up to 50%, but you risk damaging the phone if you disassemble them neatly.
💡
Replacing the battery on Xiaomi Redmi 3 costs 2-3 times less than the service, but requires care. If you have never disassembled a smartphone, practice on an unnecessary device or watch video instructions before work.
How to prolong the life of a new battery
To make the new battery last longer, follow these tips:
- 🔌 Avoid deep discharge (below 10%) and recharge (above 90%.
- 🌡️ Do not use your phone in extreme temperatures (below 0)°C or higher than 40°C).
- 🔋 Turn off fast charging if you don’t rush it – it speeds up battery wear.
- 📵 Do not leave your phone on charge all night long.
- 🔄 Calibrate once every 2-3 months: completely discharge and charge the battery.
It is also useful to turn off unnecessary background processes (such as auto-updating apps) and reduce screen brightness, which will help reduce the number of charging cycles and extend battery life by 20-30%.
Now, interestingly, today's lithium-ion batteries are designed to last 500 to 1,000 charge cycles. If you charge your phone every day, the battery will last about 2-3 years. If you use it carefully, you can extend that to 4 to 5 years.