What batteries are needed for the Xiaomi Mi Body Composition Scale 2: a complete guide to choosing and replacing

Why it’s important to choose the right batteries for Xiaomi Mi Body 2

Xiaomi Mi Body Composition Scale 2 has become a popular gadget for controlling weight, muscle mass and other body parameters. But even the most advanced device is useless without proper power. Many users face the problem: the scales suddenly stop turning on, show a Lo error on the display or give out incorrect data. 90% of the time, the reason lies in the dead batteries.

In this article, we will discuss what batteries are needed for Xiaomi Mi Body Composition Scale 2, how to replace them correctly so as not to damage the device, and what nuances are important to consider when choosing, how much are original and alternative batteries, and what to do if after weight change does not work, information is based on official Xiaomi data, user reviews and tests of independent experts.

Xiaomi Requirements: Type and Size of Batteries

According to the technical documentation of the Mi Body Composition Scale 2, the device requires 4 AAA batteries (also known as "Peaky" or "R03"). This is the standard size, but not all batteries are equally suitable for smart scales. Xiaomi recommends using:

• 🔋 Alkaline batteries – provide stable voltage and long service life (up to 12 months with regular use).
• 🔋 Lithium batteries – suitable for extreme temperatures (from -20°C +60°C), but more expensive. Perfect if the scales are in an unheated room.
• ❌ Zinc-carbon batteries – not recommended because they discharge quickly and can leak.
• ❌ Rechargeable (Ni-MH) batteries – Xiaomi does not guarantee the correct operation of the scales with them due to lower voltage (1.2V against 1.5V alkaline).

Important: each battery must have a voltage of 1.5 volts. If you use cells with a different voltage (for example, 1.2V for Ni-MH batteries), the scales may show inaccurate data or not turn on at all. Also avoid mixing batteries of different types or degrees of charge - this reduces their lifespan and can lead to leakage of the electrolyte.

Batteries comparison: which is better to choose for long work

Not all AAA batteries are the same. To keep the Mi Body Composition Scale 2 scale running smoothly, it is important to choose quality batteries. Below is a comparison table of popular models showing their capacity, lifespan and average price (based on tests and user feedback).

Lifehack: If you use scales daily, Duracell Plus Power or Energizer Ultimate Lithium are the best choice. For rare applications (for example, once a week), more budget options such as the GP Super Alkaline will be suitable. Note that cheap salt batteries (for example, Space or Photon) will last no more than 1-2 months and can damage the balance contacts due to leaks.

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Before buying, check the date of production on the battery pack. Power cells released more than a year ago can have reduced capacity even in factory packaging.

How to replace batteries in Xiaomi Mi Body 2

Replacing batteries in the Mi Body Composition Scale 2 takes no more than 2-3 minutes, but it is important to do this carefully so as not to damage the contacts or body.

1. Preparation: Turn the scales down with the display. Place them on a soft surface (such as a towel) so as not to scratch the glass.
2. Opening compartment: At the bottom of the case, find a battery lid that is attached to the latch, and carefully tuck it in with a nail or plastic map on the side where there is a small notch (usually next to the BATTERY inscription).
3. Removing old batteries: Take out all 4 batteries. Notice the polarity: there's a + and − mark in the compartment. Remember how the batteries were installed.
4. Installation of new batteries: Insert new cells, keeping polarity in mind. Make sure the contacts fit tightly. If the batteries are hanging, check if there is any oxidation or debris left in the compartment.
5. Close the lid: Gently snap the lid until the characteristic click. Don't apply excessive force - it should close without effort.
6. Check the work: Turn the scales over and step on them. If the display shows 0.0 or flashes the indicator, then the replacement was successful.

⚠️ Note: If the weights are not turned on after the weight change, check:

• The correct installation of batteries (polarity!).
• The quality of the contacts -- sometimes they're oxidized or contaminated. Rub them with a cotton swab soaked in alcohol.
• New batteries expired – expired batteries can be discharged.

Frequent problems after battery replacement and their solutions

Even if you've done it right, sometimes the Mi Body Composition Scale 2 scales don't behave properly after you've replaced the batteries.

1.The scales are not included or show Lo

Reasons:

• 🔌 One or more batteries are installed incorrectly (polarity is confused).
• 🔋 Used discharged or expired elements.
• 🔌 Oxidized contacts in the battery compartment.

Solution: Reset the batteries, check their voltage with a multimeter (should be at least 1.5V on each cell). If the contacts are oxidized, clean them with a stripe or alcohol.

2. Libras are included but show incorrect data

Reasons:

• 📉 Low voltage batteries (e.g. Ni-MH batteries) are used. 1.2V).
• 🔄 Libras not calibrated after replacement of the power supply.
• 📱 Mi Fit app is not synced with device.

Solution: Install alkaline or lithium batteries 1.5V. Reset the scales (remove and insert the batteries back), then calibrate through the Mi Fit app (Profile → Devices → Mi Body Composition Scale 2 → Calibration).

3.The batteries are discharged quickly

Reasons:

• 🔋 Cheap salt batteries are used.
• 🔌 Libras are in a wet room (such as a bathroom), which leads to the oxidation of contacts.
• 📱 Constant synchronization with the application via Bluetooth increases power consumption.

Solution: Replace the batteries with alkaline or lithium batteries. Store the scales in a dry place. Turn off automatic synchronization in the application settings if you don't use it all the time.

How to extend the life of batteries in smart scales

The average battery life in Xiaomi Mi Body Composition Scale 2 is 6-12 months, but it can be extended by following simple guidelines:

• 🔌 Turn off the power if you don’t use it for a long time (such as during a vacation.
• 📱 Turn off automatic sync in the Mi Fit app if you don't need one.Constant Bluetooth connection consumes charge.
• 🌡️ Keep the scales in a dry place with a temperature of 10–30°C. Humidity and temperature changes reduce battery life.
• 🔋 Don't mix batteries of different types, brands or degrees of charge, which leads to uneven discharge and leakage.
• 📅 Check the production date when you buy batteries that Released has been using for over a year, losing up to 20 percent of their capacity.

Critical nuance: if the scales have not been used for a long time (more than 3 months), remove the batteries from them. Even in the "sleep" mode, the batteries gradually discharge, and in the event of a leak, the electrolyte can damage the electronic components of the device.

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The use of lithium batteries (e.g. Energizer Ultimate) increases the lifespan by 1.5-2 times compared to alkaline batteries, but they are more expensive. The optimal balance of price and quality is an alkaline Duracell or Panasonic Evolta batteries.

Where to buy batteries for Xiaomi Mi Body 2: proven options

You can buy AAA batteries from any supermarket or online, but not all outlets offer quality products.

1. Offline shops

• 🏬 "The "Crossroads" is usually Duracell or GP, Check the production date.
• 🏬 "M.Video / Eldorado - a wide range, including lithium batteries.
• 🏬 Pharmacies – sometimes sell quality items (such as Varta) but at an inflated price.

2. Online venues

• 🌍 Wildberries - often stocked with Duracell and Energizer batteries.Look for sellers rated above 4.8.
• 🌍 Ozon – It’s convenient to compare prices, but pay attention to reviews (sometimes fake branded batteries).
• 🌍 AliExpress is cheaper, but delivery takes 2-4 weeks. EBL or Tenergy (if you take rechargeable ones).

⚠️ Warning: Avoid buying batteries in markets or from street vendors - there is a high risk of running into a fake or expired product:

• Holographic sticker on the package.
• The production date is not older than 12 months.
• Clear font and uniform color of the body.

FAQ: answers to frequent questions about batteries for Xiaomi Mi Body 2