Xiaomi Body Composition Scale 2: What Batteries Are Needed, How to Choose and Replace

The Xiaomi Body Composition Scale 2 has become a popular body composition control gadget, but it depends on the right power source. Many users are faced with the question: what batteries are needed for this model, where to buy them and how to replace them? Mistake in the choice of batteries can lead to improper operation of the device, rapid discharge or even damage to internal components.

In this article, we will discuss all the nuances associated with batteries for Xiaomi Body Composition Scale 2 – from the official recommendations of the manufacturer to life hacks for extending the life of the battery, you will learn how to distinguish the original batteries from their counterparts, how to avoid common replacement errors and what to do if the scales stopped turning on after installing new batteries.

We will pay special attention to the technical characteristics of the device, because inappropriate batteries can distort the readings of sensors, for example, low voltage or unstable current lead to errors in measuring muscle mass, fat levels and even weight, and we will also tell you how to save on purchase without compromising quality, because the original Xiaomi batteries cost 2-3 times more than their counterparts.

What batteries are suitable for Xiaomi Body Composition Scale 2

The manufacturer clearly states in the documentation that the Xiaomi Body Composition Scale 2 (model XMTZC05HM) requires 4 AAA batteries (LR03), but not all batteries of this format are equally effective.

• 🔋 Chemical composition: alkaline or lithium only. Zinc-chloride batteries are not suitable, they discharge quickly and can leak.
• 📏 Voltage: each element must give exactly 1.5 V. The total voltage for four batteries is 6 V.
• ⚡ Capacity: minimum 1000 mAh for alkaline and 1200 mAh for lithium.

The batteries are not included in the scales, so you need to buy them separately. Xiaomi’s official manual recommends using Duracell, Energizer or Panasonic batteries, which guarantee stable operation for 6-12 months with daily use.

Important: Don't mix batteries from different manufacturers or degrees of discharge! This can cause uneven loading and failure of both the batteries and the electronic components of the scales. If one of the batteries is dead, replace all four at once.

💡

Before buying, check the date of production on the packaging. Batteries released more than a year ago can lose up to 20% of capacity even in unused condition.

Comparison of battery types: alkaline vs lithium

The choice between alkaline and lithium AAA batteries depends on the intensity of the weights and budget.

Lithium batteries are a win-win for all but price. They are ideal for those who use scales daily or store them in a cool room (such as a bathroom), alkaline batteries are suitable for rare use - once a week or less.

Note: Xiaomi Body Composition Scale 2 cannot use rechargeable AAA batteries, their voltage is 1.2 V instead of the required 1.5 V, which will lead to measurement errors or complete failure of the device.

💡

Energizer Ultimate Lithium AAA Lithium batteries performed better in tests, lasting 18 months with daily weighing without losing accuracy.

How to replace batteries in Xiaomi Body Composition Scale 2

Replacing the batteries in Xiaomi’s smart scales takes no more than 5 minutes, but requires care.

1. Turn the scales over and find the battery compartment at the bottom of the case, and it's covered with a plastic lid.
2. Open the lid: put a nail on it, or a flat object (like a plastic card) on the side of the groove. Don't use metal tools, they can scratch the body.
3. Remove old batteries by observing polarity. Pay attention to the markings. + and − compartment.
4. Install new cells with the same polarity. Start with the extreme battery to avoid skewing.
5. Close the lid before you click. Make sure it sits flat, clear of gaps.

After the change, the scales will automatically turn on and calibrate. If the screen does not catch fire, check:

• 🔄 Polarity of batteries (turn them over if necessary).
• 🔌 Contacts in the bay -- they could have oxidized. Rub them with a cotton swab soaked in alcohol.
• 📱 The status of the scales in the Mi Fit application: sometimes you need to reconnect the device.

⚠️ Warning: If after replacing the batteries, the scales show an incorrect weight (for example, 0.0 kg or inflated values), reset. To do this, hold the on button (if any) or restart the device through the Mi Fit application (Device Profile). → Reset).

How to buy batteries for Xiaomi Body Composition Scale 2: Proven options

There are a number of places to buy the right batteries, but it's important to choose a reliable seller to avoid counterfeiting.

• 🏬 Electronics chain stores: M. Video, Eldorado, Citilink, you can find the original Duracell batteries or GP Prices are higher than on the Internet, but you can check the date of production.
• 🛒 Supermarkets: Auchan, Pyatyorochka, Magnet. They often sell batteries under their own brands (for example, Auchan Energy). They are cheaper, but the quality varies - check the reviews.
• 🌍 Online sites: Wildberries - a large selection, frequent discounts, but the risk of running into a fake (read reviews). Ozon - fast delivery, there are official stores Duracell and Energizer. AliExpress - the lowest prices, but delivery can take up to a month%.
• 🏥 Pharmacies: sometimes sell Kodak or Camelion batteries, not the most profitable option, but will help in an emergency.

Tip: buy batteries in sealed factory packaging. If the packaging is damaged or the batteries are lying in rossip, there is a high risk that they are discharged or stored in violation of conditions.

You can use stocks to save money, like the ones in Wildberries that often sell out on batteries. GP Super Alkaline (4 units over 180–220) ₽), Which are not as good as Duracell.

Frequent mistakes in choosing and replacing batteries

Even experienced users sometimes make mistakes that cause the scales to malfunction, and here are the most common mistakes and how to avoid them:

1. Salt batteries: They're cheaper than alkaline batteries, but they discharge quickly and can leak, damaging contacts. Salt batteries reduce the life of scales by 2-3 times due to the corrosion of the contacts.
2. Installation of batteries of different capacity or discharge levels, which creates an imbalance in the circuit, which leads to unstable sensors, always replace all four elements at the same time.
3. Ignoring polarity. If one battery is inserted incorrectly, the scales won't turn on. At worst, it could burn the fuse.
4. Buying batteries without checking the date. Power cells, Released more than 1.5 years ago, lose up to 30 percent of their capacity. Fresh batteries last longer.
5. Storing spare batteries in the refrigerator. It's a myth: alkaline batteries spoil from condensation. The optimal storage temperature is 15-25°C.

Another common mistake is to use batteries with an expired shelf life, and the packaging always shows the date by which the manufacturer guarantees the performance, for example, Energizer has 10 years from Release, GP has 7 years.

⚠️ Warning: If after replacing the batteries, the scales show a Lo error (low charge), but the batteries are new, the problem may be the oxidized contacts of the compartment. Clean them with a lastic or alcohol, then repeat the installation.

How to extend the life of batteries in smart scales Xiaomi

The life of the batteries in Xiaomi Body Composition Scale 2 depends not only on their type, but also on the operating conditions.

• 🔌 Turn off the scales from the Mi Fit app if you don't use them for longer than a week. Constant Bluetooth sync consumes charge.
• 🔋 Use leakproof batteries, such as the Duracell Power Pix or Energizer Max, which have a special coating to prevent leakage of the electrolyte.

Interesting fact: if you use scales less than 2 times a week, alkaline batteries can last up to 18 months. With daily weighing, they last for 6-9 months. Lithium batteries in the same mode last 1.5-2 times longer.

For maximum savings, you can combine: for example, use lithium batteries in winter (they work better at low temperatures) and alkaline batteries in summer.

💡

Regular cleaning of the contacts in the battery compartment (every 3 months) increases their life by 15-20%.

What to do if the scales do not work after replacing batteries

If after installing new power cells Xiaomi Body Composition Scale 2 is not turned on or work incorrectly, act on the following algorithm:

1. Check the polarity – even one battery that is incorrectly inserted blocks power.
2. Measure the voltage with a multimeter. Each battery should give out 1.5-1.6 V under load. If even one cell shows less than 1.3 V, replace the entire kit.
3. Clean the contacts in the oxidation compartment. Use an eraser or alcohol to do this. Do not use abrasive materials ( sandpaper) to avoid damaging the coating.
4. Reset: 1. Remove the batteries. 2. Press and hold the power button (if any) for 10 seconds. 3. Insert the batteries back. 4. Wait 1 minute - the scales should automatically turn on.
5. Reconnect the scales to the app: 1. Open Mi Fit → Profile → Xiaomi Body Composition Scale 2. 2. Click "Disable Device." 3. Start searching for new devices and pair again.

If after all the manipulations the scales still do not work, the problem may be a malfunction of the power board or sensors. In this case, contact the Xiaomi service center (addresses can be found on the website). mi.com/ru/service). Repairs cost in 1 500–3 000 ₽, depending on the breakdown.

⚠️ Warning: Don't try to disassemble the scales yourself - this will lead to a loss of warranty.The case of Xiaomi Body Composition Scale 2 is glued and is not designed for user repair.

FAQ: Answers to Frequent Battery Questions for Xiaomi Body Composition Scale 2