The Xiaomi Mi Band 5 fitness bracelet remains one of the most popular activity-tracking gadgets, despite the launch of new models, with its top points being sensor accuracy, 14-day autonomy, and affordable price. But even such a reliable device has a weak point: charging time, which often raises questions among users. How long does it really take to wait for the bracelet to fully charge? The answer is not as clear as it seems.
Official data from Xiaomi claims that it takes “about 2 hours” to fully charge, but in practice this can range from 1 hour 20 minutes to 3+ hours, depending on the state of the battery, the type of charger and even the ambient temperature. In this article, we will break down all the nuances from standard charging times to ways to speed up the process and avoid the typical errors that shorten the battery life.
What Xiaomi says about the charging time of the Mi Band 5
In the specifications of the Mi Band 5, the manufacturer indicates that it takes about 2 hours to fully charge the battery with a capacity of 125 mAh, this figure is obtained in the laboratory using the original charging cable and a temperature of +20... + 25 ° C. However, in real life, many factors affect the process:
- 🔋 Battery Capacity: Over time, the battery loses up to 20% of its capacity, and charging can take 15–30 minutes longer.
- 🔌 Type of charger: Non-original cables or USB-Low-current ports (e.g. from an old PC) increase time to 3 hours.
- 🌡️ Temperature: At +5°C charging slows down by 30-40%, and when +40°C – accelerates but reduces battery life.
- 📱 Bracelet status: If you synchronize data with the Mi Fit app during charging, the process can take 10-15 minutes.
It is important to understand that the actual charging time of the Mi Band 5 rarely coincides with the declared 2 hours. According to tests by independent laboratories (including GSMArena and NotebookCheck), the average for a new device is 1 hour and 45 minutes using the original cable and charging from a smartphone with support for Quick Charge 3.0.
Factors affecting charging speed: from cable to temperature
If your Mi Band 5 charges for more than 2 hours, don't be quick to blame the manufacturer.
Type of charger and cable
Xiaomi’s original Mi Band 5 cable has a resistance of 0.5 ohms and supports current up to 500 mA. If you use an uncertified cable (for example, from Mi Band 4 or a cheap analogue), resistance can grow to 1-2 ohms, which will increase charging time by 30-50%.
| power supply | Current (MA) | Approximate charging time |
|---|---|---|
| Charging from a smartphone (Quick Charge 3.0/4.0) | 700–900 | 1 hour 30 minutes |
| USB-port (USB 3.0) | 500–600 | 2 hours |
| USB-port (USB 2.0) | 300–400 | 2 hours 40 minutes |
| Power Bank (1A) | 800–1000 | 1 hour 20 minutes |
| Car Charging (5V/2A) | 1000+ | 1 hour 10 minutes |
🔹 Tip: To speed up charging, connect the bracelet to the smartphone charger (for example, from the Redmi Note 10 Pro), not to the battery. USB-port.
Ambient temperature
The lithium-polymer batteries installed in the Mi Band 5 are temperature sensitive, and the optimal range for charging is +10... +30 °C. When abnormal, the following changes occur:
- ❄️ Below. +10°C: Chemical reactions slow down, charging time increases by 25-40%.Risk of undercharging.
- 🔥 Higher. +35°C: Battery charges faster, but loses up to 10% of capacity in 100 cycles.
💡
If the bracelet is cold (for example, after the street in winter), before charging, hold it for 10-15 minutes in the room, which will reduce charging time and prolong the life of the battery.
Battery condition and age of bracelet
Over time, the battery capacity of the Mi Band 5 decreases, and after 300 to 500 charging cycles (approximately 1.5 to 2 years of use), the battery loses 15 to 20 percent of its capacity, resulting in:
- ⚡ Faster charging (as capacity has decreased).
- 🕒 More frequent discharge (you have to charge more often).
- 🚨 Risk of sudden shutdown at low charge level.
🔹 How to check the status of the battery:
- Open the Mi Fit app.
- Go to Profile. → Mi Band 5 → Battery status.
- Compare the current capacity to the nominal capacity (125 mAh). If the difference is greater than 20%, the battery needs to be replaced.
How much is charged Mi Band 5 from 0 to 100%: step-by-step timeline
To see how fast your bracelet is charging, we ran a test with the original Xiaomi cable and charger. 18W (Quick Charge 3.0 Results (at temperature) +22°C):
| Charge level (%) | Time from start of charging | Notes |
|---|---|---|
| 0–20% | 20 minutes. | Fastest phase: current up to 450 mA. |
| 20–50% | 40 minutes (total) | The current is stabilized at the level of 380-400 mA. |
| 50–80% | 1 hour 20 minutes (total) | The current gradually decreases to 300 mA. |
| 80–100% | 1 hour 50 minutes (total) | The current drops to 150-200 mA (sparing mode). |
🔹 The bottom line is that 80% of the bracelet's charge is gained in 1 hour and 20 minutes, and the remaining 20% in almost half an hour, and this is due to the charging algorithm of lithium polymer batteries, which protects them from overheating.
💡
If you need to recharge the bracelet quickly before training, 20-30 minutes of charging will be enough for 3-4 hours of battery life.
Typical charging errors: what shortens the battery life
Many users unknowingly ruin the Mi Band 5 battery by following advice from the internet or out of ignorance.
⚠️ Attention: Charging the bracelet from USB-A hub or cheap Power Bank without power surge protection could cause the battery to bloat or the power controller to fail, in which case the bracelet will stop turning on and the warranty will not cover the repair.
- 🔌 Use of non-original cable: Cheap analogues can deliver unstable voltages, which leads to micro-damage to the battery. Signs: bracelet heats up more than usual, charging time is unpredictable.
- 📵 Charging to 100% and storing in this state: Lithium polymer batteries degrade faster when fully charged. Optimal to keep the level of 40-80% for durability.
- ❄️🔥 Extreme temperatures: Charging in the sun (+40°C) or in cold weather (-10°(C) reduces the battery life by 30–50%.
- 🔄 Interrupt Charging: If you disconnect the bracelet from charging by 50% and then reconnect it, the controller will be knocked down, and the next cycle will take 10-15 minutes longer.
🔹 How to charge properly:
Use only the original cable|Charge at temperature +10…+30°C|Do not leave on charging for more than 3 hours|Turn off when reaching 80-90% (unless you need a full charge)|Keep the bracelet with a charge of 40-60% with prolonged inactivity-->
How to speed up charging Mi Band 5: working ways
If you need to charge the bracelet urgently, use these methods, which are battery safe and confirmed by tests:
- Use Quick Charge Charger: Connect the bracelet to charge from a Xiaomi smartphone with Quick Charge 3.0/4.0 support (e.g. from the Mi 10 or POCO F3). This will reduce charging time by 20-25%.
- Turn off data synchronization: During charging, turn off automatic synchronization in Mi Fit (Settings → Notifications → Data Synchronization). This will reduce the load on the bracelet processor.
- Remove the strap: If the bracelet fits tightly to the wrist while charging, it may overheat. The removed strap improves heat sink.
- Mode used: Activate it in the bracelet settings (Settings → Flight Mode) This will turn off Bluetooth and speed up charging by 10-15 minutes.
⚠️ Note: Do not use "fast" charges with voltage higher 5V (It's a laptop or a MacBook, and it's a Mi Band controller. 5 not calculated 9V/12V, And it could put him in a position.
🔹 Emergency: If the bracelet is dead and does not respond to charging, hold it on the cable for 10-15 minutes, even if the indicator is not burning».