How to charge the scooter Xiaomi 1S: instructions for maximum battery life

The Xiaomi Mi Electric Scooter 1S has become one of the most popular vehicles in the city due to its balance of price, quality and performance. However, even the most reliable device requires proper handling — especially when it comes to lithium-ion batteries. Incorrect charging can reduce battery life by 30-50%, and in the worst cases, lead to its bloating or even fire.

In this article, we will analyze all the nuances of charging Xiaomi 1S: From choosing the charger to the optimal temperature, you'll learn how long it takes to complete the cycle, whether you can leave the scooter on charge overnight, and what to do if the battery stops holding charge. BMS-controllers that affect battery life, but are rarely mentioned in standard instructions.

Technical characteristics of the Xiaomi 1S battery

Before we talk about charging, it is important to understand what battery we are dealing with. Xiaomi Mi Electric Scooter 1S is equipped with a lithium-ion battery with a capacity of 7650 mAh (275 Wh) with a rated voltage of 36 V. This is a classic configuration for most urban scooters, but with a number of features:

🔋 Type of elements: 18650 (10S2P — 10 consecutive cans, each of which consists of 2 parallel elements).
📊 Number of cycles: up to 500 full discharges/charges under operating conditions.
⚡ Maximum charge current: 1.7 A (standard ROM gives this current out).
🌡️ Operating temperature range: from -10°C +45°C (but charging is only possible when 0°C–40°C).

Important: in the scooter used BMS-Battery Management System, which protects the battery from overcharging, deep discharge and short circuit. BMS It's not going to stop you from gradually degrading if you systematically break the charging rules, like a regular charge at a temperature below 0.°C can cause irreversible damage to the elements after 50 to 100 cycles.

📊 How often do you charge your Xiaomi? 1S?

Every day.

In a day.

1-2 times a week

Less often, as necessary

What charger should I use?

The standard charger that comes with the Xiaomi 1S has the following options:

🔌 Entrance: 100–240 V, 50/60 Hz, 0.5 And.
🔋 Output: 42 V, 1.7 A (maximum power - 71.4 W).
⏱️ Full charge time: ~5.5 hours (0% to 100%).

Can you use charging from other Xiaomi models? Yes, but with reservations:

Model scooter	Output voltage (B)	Max. Current (A)	Compatibility with 1S
Xiaomi Mi M365	42	1.7	✅ Complete.
Xiaomi Pro 2	42	1.7	✅ Complete.
Xiaomi Essential	42	1.5	✅ Yeah, but charging longer (~6.5 hours)
Xiaomi 1S (original RAM)	42	1.7	✅ The best option
ZU with AliExpress (42V 2A)	42	2.0	⚠️ Risk of overheating BMS long-term

⚠️ Warning: Never use chargers with an output voltage higher than 42V (such as Ninebot or Segway scooters). BMS (The scooter will not charge) or, in the worst case, to the bloating of the battery.

What to do if the original RAM is lost? Only purchase certified charges marked Output: 42V 1.7A. Avoid cheap counterparts without anti-pole protection - they can damage the charging connector on the scooter.

💡

If the charger is warmer than usual, check the integrity of the cable and connector. Overheating may indicate a short circuit in the wire or a malfunction of the BMS.

Step-by-step: how to charge Xiaomi 1S

The charging process seems simple, but even here, there are nuances that affect battery life.

Turn off the scooter. Press and hold the power button for 2 seconds until the indicator goes out. Charging with the scooter on increases the load on the BMS.
Connect the charger to the socket, and then insert the connector into the scooter, which prevents sparking when you connect.
Check the indication. The RAM should light up a red LED (charging is underway) and it will turn green when fully charged.
Control the temperature. If the battery body is heated above 40°C, turn off the charge and let the scooter cool.

How long do you charge? Depending on the discharge level:

🔋 0% → 100%: ~5.5 hours.
🔋 20% → 100%: ~4 hours.
🔋 50% → 100%: ~2.5 hours.

Is the scooter off? |

Is the ZU cable in good condition?|

Battery temperature within 0°C-40°C?|

The ZU indicator is burning red?-->

Can I interrupt charging? Yes, but it's not recommended to do it more than 1-2 times a month. Lithium-ion batteries do not have a "memory effect," but frequent interruptions can interfere with the BMS calibration, which will cause the scooter to show the wrong level of charge.

Optimal charge level for battery durability

Many users mistakenly believe that the battery should be discharged to zero and charged to 100%. In fact, the optimal range for lithium-ion batteries is 20% to 80%. Why?

📉 Deep discharge (below 10%) leads to irreversible degradation of the elements, and after 5-10 such cycles, the capacity can fall by 20-30%.
⚡ Overcharging (above 90%) increases the voltage at banks, speeding up oxidation processes.
🔄 Partial cycles (20–80%) can increase battery life by up to 800–1000 cycles.

Practical advice: If you use a scooter daily, try to recharge it when the charge drops to 30-40%, and disconnect from the grid at 70-80%.

⚠️ Warning: If the scooter has not been used for more than a month, do not leave it discharged. The optimal level for storage is 40-60%. A fully discharged battery can fail after 3-6 months of idleness.

💡

Regular charging up to 100% accelerates battery degradation. For maximum life, keep the charge in the range of 20-80%.

Temperature: Why is it critical?

Temperature is one of the key factors affecting battery health. Xiaomi 1S has built-in overheat protection, but it only works at extreme values (>60 °C). Meanwhile, even regular charging at +30 °C reduces battery life by 10-15% per year.

Optimal conditions:

❄️ Charging at 0°C–10°C: Possible, but the charge rate drops by 30 to 50 percent.
🌡️ Charging at 10.°C–25°C: Perfect range. Battery charges quickly and stress-free.
☀️ Charging at 25.°C–40°C: permissible, but shortened the lifespan. Avoid direct sunlight.
🔥 Charging while >40°C: Prohibited. BMS Disable charging, but the risk of damage to the elements remains.

What to do in the heat or cold?

🌞 In summer: Charge the scooter in the shade or in a cool room. If the battery is hot to the touch, let it cool for 20-30 minutes.
❄️ In winter: If the scooter is stored on the balcony, bring it into the room 1-2 hours before charging, so that the battery warms up to room temperature.

What happens if you charge at -10°C?

At temperatures below 0°C, lithium-ion cells lose their ability to take charge. At best, the scooter will not charge, at worst, dendrites (metal processes) form inside the battery, which can cause short circuits. If you have to charge in the cold, use a thermal case or battery warmer (but don't overheat above 20°C!).

Common Mistakes and How to Avoid Them

Even experienced users sometimes make mistakes that shorten the life of the battery, and here are the most dangerous ones:

🔌 Using non-original RAMs. Charging with AliExpress often lacks protection against polarization. One wrong contact -- and BMS break out.
🕒 Charging for the night, though. BMS It turns off power at 100 percent, and then it speeds up the degradation of the battery for a long time.
🚿 Charging after washing. If the scooter is wet, moisture can enter the charging connector and cause corrosion. Wait 1-2 hours until all contacts dry.
🔋 Storage is discharged. If you leave the scooter at 0% per month, the battery can fall into deep sleep and stop taking charge.

How do we fix the consequences?

If the scooter does not charge after using an unoriginal RAM, check the fuse in the connector (it can burn).
If the battery is swelling, don't try to repair it, go to a service center, and it indicates irreversible chemical processes.
If the scooter suddenly turns off at 30-40% charge, BMS calibration is required (discharge to 0% and charge to 100% without interruption).

How to extend the battery life: additional tips

In addition to proper charging, other factors also affect the battery durability:

🛣️ Driving style: Accelerating and braking dramatically increases battery load; running smoothly saves up to 15 percent on a single trip.
🏋️ Driver weight: At over 90 kg, battery life is reduced by 10-20%. If you are heavier, avoid high-speed uphill driving.
🔧 Tire pressure. The flat tires increase the drag and make the engine work harder, which drains the battery faster.
📱 Update of firmware: In new versions of the software, Xiaomi optimizes control algorithms BMS. Check the updates in the official Mi Home app.

How long does the battery last? If all the rules are followed, 2-3 years (or 300-500 cycles); if the scooter is used intensively (daily, in all weather conditions), the period can be reduced to 1.5 years.

Maximum speed reduction.
Reduced range by 20-30%.
The scooter is turned off at 30-40% charge.

If the battery fails, it can be replaced.The cost of a new battery for Xiaomi 1S — about 8,000-12,000 ₽ (The alternative is to buy a used battery from a donor scooter, but it's risky: you don't know how it was exploited.

FAQ: Answers to Frequent Questions

Can I charge Xiaomi 1S from Powerbank?

Technically yes, if powerbank supports output voltage of 42V and current of 1.7A. However, most portable batteries have output of 5V/9V/12V, so you will need an intermediary - an inverter or a special adapter. Without it, you risk burning the scooter controller. Recommendation: Use powerbank only in emergency cases and do not leave the scooter unattended during charging.

Why is the scooter not charged, although the indicator on the RAM is burning?

There are several reasons: a faulty charger (check on another scooter); contacts in the charging connector (clean with alcohol); BMS protection has been triggered due to overheating or short circuit; battery failure (requires diagnostics in the service); first try to reboot the scooter: hold the power button for 10 seconds, then reconnect the RAM.

How to properly store a scooter in winter?

If you don't plan to use the Xiaomi 1S for a few months: Charge the battery to 40-60%. Turn off the scooter and remove the battery (if you can). Store in a dry place at 10 ° C-25 ° C. Every 2 months recharge up to 50% (to avoid a deep discharge). If you leave the scooter discharged in the cold, the battery can irretrievably lose up to 50% of capacity.

Can I ride a scooter while charging?

It's dangerous for several reasons: the risk of battery overheating and fire, the load on the BMS, which is not designed to charge and discharge simultaneously, damage to the charging connector due to vibration, if you need to get there urgently and the charge is running out, you better push the scooter with your foot or call a taxi.

What if the scooter does not turn on after complete discharge?

Most likely, the BMS blocked the battery because of a deep discharge. Try: Connect the original RAM and leave it for 1-2 hours (even if the indicator does not burn). If it does not work, turn off the RAM, press and hold the power button for 15 seconds, then recharge. If the battery does not come alive, you will need to flash the BMS or replace the battery. Important: Do not try to light the battery from another source - this can cause a short circuit.