What battery is in the scales Xiaomi: a complete guide to types and replacement

Xiaomi smart scales are some of the most popular gadgets for home use due to their accuracy, synchronization with the Mi Fit app and affordable price. However, even such advanced devices require periodic replacement of batteries. In this article, we will analyze which batteries are used in different Xiaomi scale models, how to replace them correctly, and give tips on how to extend the life of the device.

Many users are faced with a problem: scales stop turning on or show incorrect data, and the instructions do not have clear instructions on the type of batteries. We analyzed the specifications of all current models – from Mi Body Composition Scale to Xiaomi Smart Scale 3 – and collected full information, including alternative battery options and possible errors during replacement.

What batteries are in Xiaomi scales: a full list of models

Depending on the scale model, Xiaomi uses different types of batteries, most of which are powered by standard AAA or CR2032 batteries, but there are exceptions.

• 🔋 Xiaomi Mi Body Composition Scale (1st generation) – 4 batteries AAA (LR03)
• 🔋 Xiaomi Mi Smart Scale 2 – 4 batteries AAA (or Ni-MH batteries of the same format)
• 🔋 Xiaomi Smart Scale 3 – 1 battery CR2032 (lithium pill")
• 🔋 Xiaomi Mi Scale V1 — 4 batteries AAA
• 🔋 Xiaomi Mi Body Fat Scale (Chinese version) – 4 batteries AAA 1 CR2032 (subject to audit)

It is important to note that in some regions (e.g. Europe), scales may come with a different type of pre-installed battery, for example, the BR2032 may be replaced by the CR2032, which is an interchangeable counterpart with similar characteristics but from different manufacturers.

In the scales Xiaomi Smart Scale 3 uses a battery CR2032 with a voltage of 3 V, while in most other models – 4 AAA batteries of 1.5 V, giving a total voltage of 6 V. This is a fundamental difference, and an attempt to replace one type with another will lead to a breakdown of the device.

Where to buy batteries for Xiaomi scales: proven options

When buying Xiaomi scales, it is important to avoid counterfeits and low-quality batteries that can quickly discharge or even damage the device.

• 🛒 Official Xiaomi Store (complete with weights or separately)
• 🛒 Specialized online stores (e.g. AliExpress, Beru, Ozon) – look for sellers with a rating above 95%)
• 🛒 Electronics chain stores (M.Video, Eldorado, Citilink)
• 🛒 Pharmacies or supermarkets (for batteries) CR2032 — They are often sold in departments with watches or keychains)

When choosing AAA batteries, choose Duracell, Energizer or GP alkaline brands. They last longer than salt batteries and are less prone to electrolyte leaks. Maxell, Panasonic or Varta batteries will be suitable for the CR2032.

⚠️ Warning: Don't buy batteries CR2032 Cheap analogues can have a real capacity of 2-3 times lower than the declared, which will lead to frequent replacements and possible malfunctions of the scales.

If you use a Mi Smart Scale 2 or Mi Body Composition Scale, you might consider switching to AAA Ni-MH batteries. They are more expensive to buy, but they can be recharged up to 1,000 times, which is more economical in the long run.

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Before buying batteries, check their production date on the packaging. Fresh cells (not older than 1 year) will last longer, since the self-discharge of lithium and alkaline batteries is minimal in the first year of storage.

Step-by-step: how to replace the battery in the scales Xiaomi

Xiaomi's weight replacement process is model-dependent, and in most cases it doesn't require special tools, but it's important to follow the instructions so you don't damage the device. Below is a universal algorithm for popular models.

For AAA (Mi Smart Scale 2, Mi Body Composition Scale):

1. Turn the scales over and find a battery compartment (usually located in the center of the bottom panel).
2. Move the compartment cover in the direction indicated by the arrow (or put it in a flat screwdriver if there is no latch).
3. Remove old batteries while observing polarity (+ and − should match the marking in the compartment).
4. Install new batteries starting with the far right (if marked 1-4).
5. Close the lid before you click.

For CR2032 (Smart Scale 3) battery scales:

1. Turn the scales over and find a small circular compartment (usually under a rubber leg).
2. Tap the compartment cover with a coin or plastic card (do not use metal objects so as not to scratch the case).
3. Remove the old battery by pulling it over the edge (tweezers can be used).
4. Install the new battery plus up (on most Xiaomi models, the polarity is indicated on the compartment cover).
5. Close the lid, slightly pressing it until it is fixed.

After the battery is replaced, the scales should automatically turn on. If this does not happen, try:

• 🔄 Press the scales (sometimes mechanical activation is required).
• 🔄 Reset the scales by holding the reset button (if there is one in your model).
• 🔄 Check the polarity of batteries and the density of contacts.

⚠️ Warning: Smart Scale 3 scales when battery installation is incorrect CR2032 (So if you have a entangled polarity, you can have a short circuit protection, and the device doesn't turn on, and then you take out the battery, you wait 10 seconds, and you reset it.

Frequent Battery Replacement Mistakes and How to Avoid Them

Even a simple procedure like replacing your batteries can lead to problems, if you don't take into account some nuances, and here are the most common mistakes and ways to prevent them:

• 🔌 Polarity non-observance. If batteries are AAA Incorrectly installed (for example, two) + ce +), The scales won't turn on, and in the worst case, there may be a short circuit.
• 🔌 Using batteries of different capacity or degree of charge, if one battery is almost discharged and the rest are new, this will lead to unstable balances. Always replace all elements at the same time.
• 🔌 Getting dirt or moisture into the compartment. Before installing new batteries, wipe the contacts in the compartment with a dry cloth or cotton swab soaked in alcohol.
• 🔌 We've got expired batteries, and even new-looking batteries can be discharged if they've been in storage for years.
• 🔌 Use force when closing the lid. If the lid doesn't close, check if the batteries are properly installed, rather than pressing it, it can break the latches.

Pay special attention to the Smart Scale 3 scale with CR2032 battery, because of its small size, it is easy to lose the compartment cover or install the power supply curve.

• 🔍 Contact of the battery with the spring in the compartment (sometimes the spring may be bent).
• 🔍 No oxidation on the contacts (if there is a green coating, clean it with a swallow).
• 🔍 Density of the lid fitting – if it is not fixed, the battery may shift.

If the scales still don't work after all the manipulations, the problem may not be in the batteries, but in the device itself, in which case try resetting (if the model provides it) or contact the service center.

How to extend the life of batteries in Xiaomi scales

The life of Xiaomi’s battery packs depends not only on their quality, but also on the operating conditions. Following simple recommendations, you can increase the interval between battery replacements by 1.5-2 times:

• 🔋 Keep the scales in a dry place. Humidity accelerates the corrosion of contacts and increases the self-discharge of batteries.
• 🔋 Remove the batteries if you don't use the scales for a long time, for example, if you're going on a month's vacation, it's best to take out the batteries.
• 🔋 Use alkaline batteries. They last longer than salt batteries and are better at handling loads.
• 🔋 Avoid extreme temperatures. Do not place the scales near the heating battery or on the cold floor (optimum 10-35).°C).
• 🔋 Clean the contacts regularly. Oxidation or dirt on the contacts increases resistance and shortens battery life.

For Smart Scale 3 with CR2032 battery, there is an additional life hack: if the scales are used rarely (for example, once a week), you can put a thin layer of insulating tape between the battery and the contact for storage time. This will prevent microdischarges, but be sure to remove the tape before using!

If you use rechargeable Ni-MH batteries in AAA scales, remember:

• 🔄 Only charge them after full discharge (this prolongs the service life).
• 🔄 Store charged – in the discharged state of Ni-MH, batteries degrade faster.
• 🔄 Use a “smart” charger with ΔV-cut-off function.

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Xiaomi’s AAA alkaline batteries last an average of 12-18 months on a daily basis. Lithium CR2032 batteries can last up to 3 years thanks to their low self-discharge.

Alternative power options: can batteries be used?

Many users are wondering: can you replace conventional batteries with batteries so as not to buy new batteries every year?

• ✅ Mi Smart Scale 2 and Mi Body Composition Scale – Ni-MH batteries can be used AAA 1.2 V. Despite the fact that their voltage is slightly lower than that of alkaline batteries (1.5 V), the scales will work stably.
• ❌ Smart Scale 3 – No Replacement CR2032 Lithium "pills" are not intended to be recharged, but similar batteries (e.g, ML2032) have a different voltage and can damage the device.

Benefits of using Ni-MH batteries in supported models:

• 🔄 Long-term savings (1000 charge cycles vs. disposable batteries).
• 🔄 Less harm to the environment.
• 🔄 Possibility of fast recharging (in 1-2 hours).

However, there are also disadvantages:

• ⚠️ Higher initial cost (quality batteries) + Charger will cost 2-3 times more expensive than a set of alkaline batteries).
• ⚠️ Self-discharge ~1% per day (if the scales are not used for a long time, the batteries will run out).
• ⚠️ The need for charge control (cannot be left on charging for more than 12 hours).

If you're going to switch to batteries, go for models with a capacity of at least 1,000 mAh (e.g. Eneloop or GP Rechargeable) and avoid cheap no-name batteries, which lose capacity quickly and can leak.

FAQ: answers to popular questions about Xiaomi batteries in scales