Many owners of smart gadgets are wondering: can you dive with Xiaomi Mi Band or swim in Redmi Watch in salt water? The answer to this question is not as clear as it seems at first glance, and lies in the technical characteristics of the protection of each particular device. Modern fitness trackers and smart watches from the Chinese manufacturer are often equipped with serious moisture protection, but the conditions of operation in the pool and in the open sea are radically different in their aggressiveness.
In this article, we will take a closer look at the IP68 and 5 ATM labeling, explaining what they mean in real life, not just on paper. You will learn which Mi Smart Band and Xiaomi Watch models are really suitable for diving or surfing, and which can survive only an accidental fall into the sink.
It's important to note that even waterproof devices lose their protective properties over time. The adhesive that seals the case can dry out, and the microholes for microphones or speakers can get clogged with sand. Salt seawater is an electrolyte and, when ingested, causes instantaneous contact corrosion, which is often irreversible even after drying. So, before each swim, it's worth checking the condition of the gadget carefully.
Difference between IP68, 5 ATM and ISO 22810
The first thing a user encounters when choosing swimming accessories is the confusing marking on the box.Most modern models, such as the Xiaomi Smart Band 7 or 8, are labeled 5 ATM. This means that the device withstands static pressure equivalent to diving to a depth of 50 meters. However, this does not give a carte blanche for scuba diving.
IP68, which is often used in budget models, is about dust protection and short-term immersion, but here's the catch: IP testing is usually done in fresh water at room temperature and without dynamic loads, while at sea, the water is denser, saltier and in constant motion.
ISO 22810 is more stringent and focused on swimming watches, and it takes into account not only depth, but also exposure to chlorinated water, salt water and temperature changes. If you have this standard on your watch box, the chances of a long life in water are much higher. Otherwise, you shouldn't rely on "maybe" for a long life.
- 🌊 5 ATM: It can withstand pressure up to 5 bar, is suitable for swimming in the pool and snorkeling in shallow water, but not for diving.
- 💧 IP68: Protection against splashes and short-term diving, but not intended for active swimming or diving.
- ⏱️ ISO 22810: Specialized standard for waterproof watches, taking into account water dynamics and chemical composition.
⚠️ Attention: Dynamic water pressure with a sharp swing of the hand while swimming with a crawl can be many times higher than static pressure at a depth of 1 meter. This creates a risk of moisture penetration even in certified devices.
Xiaomi and Redmi models for swimming
In the current product lineup, there are several categories of devices: the Mi Smart Band fitness trackers, which have traditionally been the leaders in water reliability since the 4th generation, are easier to seal, and the lack of protruding speakers reduces the risk of water getting in.
Smartwatches of the Xiaomi Watch series (e.g. Lite, Active, S1/S2/S3) are also often equipped with 5 ATM protection. However, in larger cases, the number of holes (for microphones, speakers, charging contacts) is larger, which theoretically increases vulnerability. Redmi Watch models tend to also meet the 5 ATM standard, making them suitable for swimming pools.
The specialty sports watches, like the Amazfit (Xiaomi ecosystem), which may be certified for diving, stand out. But if you're talking about the Xiaomi brand, the latest generations of trackers are the best for regular seafaring, and they are easier to tolerate aggressive environments because of their simple design.
When choosing a particular model, pay attention to the physical "Swimming" mode in the software. This is not just marketing: when you activate this Settings mode → Profile → Swimming, the device blocks the touchscreen so that the water does not cause false presses, and starts pumping sound out of the speaker after surfacing.
Why sea water is more dangerous than swimming pool
Swimming in a pool of chlorinated water is already stressful for electronics, but the sea is a whole other level of complexity: Salt water contains sodium chloride and a host of other minerals that, when dried, form crystals, which can mechanically damage sealing gums or get stuck in charging connectors.
Salt water is also an excellent conductor of electricity, and while fresh water may not have short circuits due to low conductivity, even a microscopic crack in the shell will cause the board to fail instantly, corrosion begins immediately, and often the process of breaking the contacts becomes irreversible within hours of contact.
Temperature also plays a role. When you enter cold seawater with your wrist warmed up in the sun, you create a temperature difference. It causes thermal expansion and compression of the materials in the case, which can temporarily disrupt the tightness of the adhesives. Water can be sucked in through microgaps as it cools.
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After each swim in the sea, be sure to wash the watch under a weak stream of fresh cool water for 30 seconds to wash off the salt plaque, and dry with a soft cloth.
How to check the tightness and prepare the watch for water
Before dipping the gadget into water, you need to conduct a visual inspection.Make sure that the case is free of visible cracks, chips or deep scratches, especially in the stack and back cover area.Any violation of the integrity of the housing automatically deprives the device of water protection, regardless of the declared IP or ATM rating.
Check the condition of the strap and its attachment. If you use a third-party strap, make sure it sits tightly and has no sharp edges that could damage the seal. For straps, check if there is sand or dirt on them, which can abrasively affect the body when you move your hand.
In software, you should activate the water-lock mode if this is available in your model, this can be done through Control Center → Swimming Mode or similar menu item, and make sure that the device's firmware is updated to the latest version, as manufacturers often improve their algorithms for working with humidity sensors.
☑️ Pre-swim checks
⚠️ Warning: Never charge a watch if it has been in water, even if it is completely dry outside.Moisture can remain in charging ports, leading to oxidation of contacts and short circuit when the current is applied.
Table of compatibility of models and types of water bodies
To organize the information, we have prepared a summary table that will help you quickly navigate the capabilities of popular devices, remember that the manufacturer's warranty does not usually cover damage caused by water ingress, so the risk assessment remains with the user.
| Model of the device | Standard of protection | Pool (chlorine) | The sea (salt) | Diving |
|---|---|---|---|---|
| Mi Smart Band 6/7/8 | 5 ATM | ✅ Yes. | ⚠️ Carefully. | ❌ No. |
| Xiaomi Watch S3 | 5 ATM + ISO | ✅ Yes. | ⚠️ Carefully. | ❌ No. |
| Redmi Watch 3 Active | IP68 | ❌ Not recommended | ❌ No. | ❌ No. |
| Xiaomi Watch 2 Pro | 5 ATM + ISO | ✅ Yes. | ⚠️ Carefully. | ❌ No. |
And you can see from the table that even the top models are not designed for professional diving"⚠️ “Caution” means that the device will technically withstand the dive, but the risk of damage due to an aggressive environment remains high and you act at your own risk.
Caring for the gadget after contact with water
Proper after-swimming care is key to a long life for your device. Immediately after you leave the water, wipe the case with a soft, lilaless cloth. Do not use a hair dryer or other heating appliances for drying, as hot air can damage the adhesive seals and deform the plastic.
If you've been swimming at sea, the ideal option is to have a light rinse under a fresh water tap, which will remove the salt plaque, which, when crystallized, can damage the screen or buttons, and after rinsing, wipe the device thoroughly and leave it in the air at room temperature until it completely drys out.
What to do if water gets into the speaker?
Notice the heart rate sensor on the back, and the water droplets can distort the readings or cause skin irritation, and make sure that the area is completely dry before you put your watch back on your wrist for permanent wear.
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The main principle of safety: water resistance is not a permanent property, but a temporary characteristic that deteriorates over time due to wear, shocks and temperature changes.
Frequent problems and manufacturer’s guarantees
Many users mistakenly believe that having a 5 ATM label gives a full guarantee against any water problems. However, in the warranty conditions of Xiaomi and other brands, moisture entering the device is often classified as a case that is not subject to free repair.
Typical problems after bathing are fogging of the screen under the glass, failure of the vibrator motor or "floating" touchscreen. If you notice fogging, immediately remove the device from the water (if it is still there) and dry. In some cases, putting the gadget in a sealed bag with silica gel for a day helps, but this is not a panacea.
To minimize the risks, try not to press the buttons underwater unless the instructions say otherwise. Pressure of water when pressed can push the membrane of the button inside, breaking the tightness. Use touch control only if the screen responds to wet fingers, or wait out of the water.