What batteries are in Xiaomi scales: types, compatibility and replacement

Xiaomi smart scales are some of the most popular health-control gadgets, but they depend on the right choice of batteries. Many users face a problem: the device suddenly stops turning on, shows the wrong weight or quickly discharges, 90% of the time lies in the wrong batteries or their improper installation.

In this article, we will discuss in detail what batteries are needed for different Xiaomi scale models (from Mi Smart Scale 1 to Mi Body Composition Scale 2), where to buy them, how to replace them without risking damage to the device, and why cheap analogues can reduce the life of a gadget by 2-3 times.

Note: the information is relevant for all modern models of scales Xiaomi, including those sold under the brand Mi or Xiaomi Smart. If your model released after 2020, the data from this article will fit 100%. For outdated versions (until 2018) there may be nuances – we will also mention them separately.

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What batteries are suitable for Xiaomi scales: official requirements

All Xiaomi smart scales are powered by four type batteries AAA (fingers, size R03). This is the standard for most electronic scales, but there are important nuances here:

1.Voltage and capacity: Original batteries should produce 1.5 V each (total 6 V for the device). Capacity - at least 1000 mAh. If you take cells with a lower capacity (for example, 800 mAh), the scales will discharge 1.5-2 times faster, especially with frequent use of the function of measuring body composition.

Xiaomi recommends alkaline batteries of Duracell, Energizer or Panasonic Evolta brands, which last longer and work consistently at low discharge levels, Zinc-Chloride batteries are cheaper, but will last a maximum of 2-3 months with active use.

Prohibited types:

• 🔋 Rechargeable (Ni-MH or Ni-Cd) – 1.2 V instead of 1.5 V will lead to measurement errors or complete failure of the device.
• 🔋 Lithium – although they are longer lasting, their voltage (1.5–1.8V) can damage the electronic scale board.
• 🔋 Counterfeiting under well-known brands - often have an understated capacity and can leak.

Xiaomi’s official documentation states that the use of incompatible batteries will void the warranty.If the scales break due to inappropriate power supplies, the service center will refuse repairs.

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Comparison of batteries for different models of Xiaomi weights

Not all Xiaomi scales are the same, they have different control boards and power consumption. Below is a table with recommendations for popular models:

Important for the Mi Body Composition Scale 2: this model is particularly sensitive to battery quality. Cheap analogues can cause failures in measuring muscle mass and water level in the body. ±5 kg), first replace the batteries – even if they have not yet completely discharged.

For models older than 2018 (Mi Smart Scale 1 of the first revision), there are sometimes problems with battery compartment contacts. If the new batteries do not work, check if the metal plates inside the compartment are bent - they can be bent carefully with tweezers.

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Where to buy the right batteries: proven options

Quality Xiaomi scale batteries can be bought in four types of stores:

• 🏪 Supermarket chains (Auchan, Crossroads, Magnet) are convenient but limited in range, often selling salt batteries under the guise of alkaline batteries.
• 🛒 Specialized electronics stores (M.Video, Eldorado, Citilink) - a wide range of brands, but prices are above average.
• 🌍 Online sites (Wildberries, Ozon, AliExpress) are the lowest prices, but the risk of running into a fake.
• 🏢 Official Xiaomi stores - sometimes sell branded battery sets (4 units in a blister), but they are more expensive than analogues.

Average prices for alkaline batteries AAA (packaging of 4 pieces) in 2026:

• 💰 Duracell — 250–350 ₽
• 💰 Energizer — 220–300 ₽
• 💰 GP Super — 180–250 ₽
• 💰 Kodak — 150–200 ₽ (budgetary option with acceptable quality)

⚠️ Attention: AliExpress often sells batteries with overcapacity (for example, "2500 mAh" for the first time). AAA). Physically, it is impossible - the maximum capacity for AAA-format ~1200 mAh. These "wonderful" batteries usually discharge in a week.

If you want to save money without risk, take it. GP Super Alkaline or Kodak Max, which are cheaper than Duracell, but they last almost as long on tests, but the batteries of the nouneim brands (such as "Super Power"*) are better to avoid, they can leak and spoil the balance contacts.

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Step-by-step: how to replace batteries

Replacing the battery in Xiaomi's scales seems simple, but there are pitfalls here. Follow this instruction to avoid mistakes:

Preparation:

Turn the scales over and find the battery compartment (usually it is closed with a plastic lid with a latch).

Prepare 4 new batteries of the same type and brand (you can not mix different brands!).

Take a thin screwdriver or plastic card to open the lid.

Removal of old batteries:

Carefully tuck the compartment lid and remove it, and don't put too much effort into it, because the plastic can crack.

If one of them leaks, clean the contacts with a cotton swab soaked in alcohol.

Installation of new components:

- Put the batteries in a strictly polarity pattern (plus to plus, minus to minus).

Press until you click, which means that the contact is securely fixed.

- Close the lid and make sure it sits tight, without gaps.

Checking the working capacity:

Put the scales on a flat surface and turn it on (on most models you need to step on the platform).

If the screen does not light up, check:

- The correct installation of batteries (turn them over).

Quality of contacts (possibly one of the batteries did not fully settle into the nest).

⚠️ Warning: If after replacing the batteries, the scales show an Err or Lo error, it means that at least one battery is installed incorrectly or discharged.

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Frequent Mistakes and How to Avoid Them

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

1. Use of batteries of different grades of discharge or brands.

Problem: Libras can work unstablely or discharge quickly.

Solution: Always install a set of 4 new batteries of the same brand. Never mix old and new items.

2. The battery compartment is not tightly closed.

Problem: The lid may move away when weighed, interrupting contact.

Solution: After you replace it, press the lid until you click it, and if it dangles, put a thin layer of insulating tape on the latches.

3. Ignoring the signs of leakage.

Problem: Acid from a leaky battery corrodes the contacts, which leads to a breakdown of the scales.

Solution: Check the batteries when you replace them, and if they have white coating or rust on them, clean the contacts with alcohol and cotton swab.

4. Purchase of batteries with expired expiration date.

Problem: Even unused batteries lose up to 30% of their capacity in 2-3 years of storage.

Solution: Check the date of production on the package. The optimal age of the batteries is no older than 1 year.

5. Use of rechargeable batteries (Ni-MH).

Problem: Voltage 1.2 V instead of 1.5 V causes sensor failures.

Solution: If you have already bought such batteries, use them in remotes or flashlights, but not in Xiaomi scales.

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If the scales after the battery change show the wrong weight, perform the calibration: step on the platform, hold for 5 seconds, then remove your leg and step. Repeat 2-3 times.

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How to extend the life of batteries in Xiaomi scales

The life of the battery depends not only on its quality, but also on the operating conditions. Here are some proven ways to increase battery life:

• 🔌 Remove the batteries for prolonged non-use (for example, if you go on vacation). Even when the scale is off, the scale consumes minimal current.
• 🌡️ Keep the scales in a dry place at room temperature (15–25)°Humidity accelerates the corrosion of contacts, and heat reduces the life of batteries.
• ⚖️ Do not load the scales beyond the maximum limit (usually 150-180 kg.
• 📱 Turn off sync with the app if you don't use it all the time.
• 🔄 Clean the battery compartment contacts from oxidation regularly (every 3-6 months.

The average life of alkaline batteries in Xiaomi scales, subject to these rules:

• 📅 Mi Smart Scale 1/2 — 8–12 months.
• 📅 Mi Body Composition Scale 2 – 5–7 months (due to high power consumption of bioimpedance sensors).

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Xiaomi scales are not included even with new batteries: what to do

If the scales do not respond after replacing the batteries, the reasons may be as follows (from the simplest to the most complex):

Incorrect installation:

- Recheck the polarity (plus to plus, minus to minus).

Make sure the batteries are tightly seated in the nests.

Contact oxidation:

- Clean the contacts in the battery compartment with a strip or alcohol.

- If the oxidation is strong, use fine sandpaper (granularity 1000).+).

Failure of the food charge:

- Check the charge for bloated capacitors or blackened tracks.

If it smells like a burn, the scales need repair.

Firmware failure:

Try resetting: flip the scales and press the Reset button (if any) for 10-15 seconds.

For Bluetooth models: Remove the scales from the Mi Fit app and re-sync.

Mechanical breakdown:

Check if the scale platform is cracked (especially if heavy objects were dropped on it).

If the weight sensors (tensometers) are damaged, replacement will be required.

⚠️ Note: if the scales of Mi Body Composition Scale 2 show an error E8, This indicates that the bioimpedance sensor is not working properly, and self-repairing is not going to help, but we need to replace the module at the service center.

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In 60 percent of cases, Xiaomi's "defaulty" scales are revived by simply cleaning contacts or installing batteries correctly.

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FAQ: Answers to Frequent Questions