The Xiaomi M365 is one of the most popular models among urban dwellers, but even such a reliable device has battery problems over time. Battery replacement may be required if capacity falls, cells bloat or mechanical damage. However, removing the battery from the M365 is not an easy task: the manufacturer has hidden the battery under the deck, and disassembly requires accuracy and special tools.
Many owners are afraid of damaging the control board or contacts, and some do not even know that the battery can be removed without a complete disassembly of the scooter. In this article, we will take a Step-by-step, point out typical errors and give recommendations on choosing a new battery. If you have never repaired equipment, it is better to entrust the work to the service center — but with patience and tools, you can do it yourself.
Preparing for battery removal: tools and safety measures
Before you start disassembling, make sure you have everything you need, and without the right tools, you risk breaking the screws, damaging the body, or even shorting the case.
- 🔧 Cross screwdriver (better magnetic, size) PH2) — for the deck screws and battery compartment.
- 🔨 Plastic blades or mediators – to gently tuck the cover without scratches.
- 🔋 Multimeter – to check the voltage on the contacts (optional, but recommended).
- 🧤 Rubber gloves – protection against possible sparks or leakage of electrolyte.
- 📦 Container for screws - so as not to lose small parts (in the M365 More than 10 pieces!).
Also, prepare the workplace: the table should be clean and well lit. Don't disassemble the scooter on the floor - small parts are easy to lose, and dust can get inside the case. If you remove the battery due to its bloating, do not puncture the battery and do not expose it to mechanical stress - this can lead to fire.
⚠️ Warning: If the battery is deformed (swelled, leaked), do not try to disassemble it yourself. Lithium-ion batteries can ignite or explode if damaged.
Before starting work, completely discharge the scooter, which will reduce the risk of sparking when disconnecting contacts, and also disable the Bluetooth connection to the Mi Home application if it was active.
Step 1: Removal of the scooter deck (top cover)
The battery in the Xiaomi M365 is hidden under a deck, a plastic cover that attaches to the frame of the scooter. To remove it, you need to unscrew 8 screws (6 on the sides and 2 on the front, under a rubber plug).
- Turn the scooter upside down with your wheels and put it on a flat surface, and put a soft cloth in there so you don't scratch the steering wheel.
- Remove the rubber plug on the front of the deck (plastic blade) and there are two additional screws underneath.
- Unscrew all the screws, starting with the side screws. Don't put too much effort into it, because the thread in the plastic breaks down easily.
- Carefully tuck the deck with a spatula on the back side (there is a special groove) and remove it, moving forward.
If the deck is not amenable, check if all screws are unscrewed. Sometimes the manufacturer adds hidden mounts - for example, under stickers. The M365 does not have this, but in the Pro or Pro 2 versions there may be additional latches.
⚠️ Attention: When you take the deck off, don't pull it upwards, there are wires from the battery to the control board inside. You can accidentally rip them off. Under the deck, you'll see a battery pack mounted on the frame. It's connected to the main board through a connector. JST (At this point, don't disconnect the battery, you need to unscrew the battery's mounts first. ☑️ Preparation for the removal of dekiSwitch off the scooter from charging Turn the scooter wheels upRemove the rubber plug from the front 8 Fill the deck with a plastic spatula Completed: 0 / 5 Step. 2: Now that the deck is off, you can start to shut down the battery, and the key here is to keep the sequence in order not to damage the contacts or cause a short circuit. It is attached to the frame with four screws (two on each side). Unscrew them. Carefully lift the battery and find the white JST connector connecting it to the board. It's closer to the front wheel. Don't pull the wires! Take the plastic case of the connector and lightly move upwards disconnect it. If it doesn't, swing it a little left-right. After disconnecting the connector, check the voltage on the battery contacts with a multimeter (it should be 36-42 V in a charged state). If the connector is oxidized or contaminated, clean it with a light upward movement, disconnect it from the batteries, and then they can safely use the plugs. Problem when disconnecting Possible cause Solution Connector not disconnected Latch jammed or oxidized contacts Swing connector left-right, use alcohol to clean the spark when disconnecting Short circuit or residual charge Discharge scooter to 0%, check the insulation of the screw wires unscrewed thread or inappropriate screwdriver Use a screwdriver with a magnetic tip or WD-40 If you're taking off the battery to replace, take a picture of the location of the wires and connectors, which will help you connect the new battery correctly. M365 (for example, M365 Pro) there may be an additional temperature sensor connected by a separate thin wire! 💡If I connect JST damaged, don't try to repair it, replace it with a new one, it costs a penny, and unreliable contact can lead to overheating or failure of the scooter. Step 3: Remove the battery from the case After disconnecting the connector, you can remove the battery from the case. M365 It's not just screwed, it's also mounted with two plastic latches on the sides, so you don't want to break them, but you have to be careful: Lift the battery behind the front (where the connector is) and pull it around a little bit. If you feel resistance, check if you forgot to unscrew the screws or unfasten the latches. ~30°, So you don't have to get the wires on the control board. M365 It weighs about 1.5 kg, so don't drop it, it could damage the internals: 🔋 Bloating is a sign of failure of one or more elements. 💧 Electrolyte stains - requires immediate disposal. 🔌 Oxidized contacts – need to be cleaned before installing a new battery. If you're planning to dispose of an old battery, don't throw it away in the trash. Lithium-ion batteries require special recycling. Most cities have reception points that you can find through services like EcoLamp or IBO. Sometimes, due to corrosion or deformation, the battery "sticks" to the metal frame. In this case, do not try to tear it out - use a plastic blade to gently fit the body around the perimeter. If it does not help, treat the joints. WD-40 and wait 10–15 Step. 4: Checking a new battery before installing If you are buying a replacement, make sure the new battery is compatible with Xiaomi M365. Original batteries are labeled BMS-XM15 or BMS-XM18 (For the Pro modifications, check also: 📏 The sizes must be the same as the original (approximately). 380×90×70 mm). 🔌 The connector should be the same (JST-XH 6-pin). 🔋 Voltage: 36 V for the standard version, 42 V for the Pro. 🔄 Presence BMS (without it, the battery will quickly fail. Before installing a new battery, check it with a multimeter: Set a constant voltage measurement mode (DC 200V). Connect the probes to the extreme contacts of the battery (polarity is not important). The voltage should be within 38-42 V for a charged battery. If the voltage is below 30 V, the battery is discharged or faulty. Do not install it - this can cause malfunction of the scooter controller. Also inspect the contacts for oxidation - if necessary, clean them with a swallow or alcohol. ⚠️ Note: Some “improved” third-party batteries may have larger capacity but are incompatible with the battery. BMS This leads to an incorrect charge indication or overheating. Buy only proven models with reviews. 💡Even if the new battery looks identical to the original, always check its voltage and insulation integrity before installing it. This will keep the scooter from short circuit. Step 5: Battery installation and scooter assembly The new battery is set in reverse order, but there are a few nuances: Carefully place the battery in the compartment, combining the fastening holes with the frame. Connect the connector. JST Make sure it's tightly latched -- bad contact leads to controller errors. Twisted all four battery mount screws. Don't pull over -- moderate enough effort. Set the deck in place, starting at the back. Make sure all latches are up correctly. Turn the deck screws in reverse sequence (front back) after assembly, do not turn on the scooter immediately. First: Make sure all the wires are laid neatly and not clamped. Make sure the deck is tightly attached to the frame without gaps. Connect the charger and wait for the indicator to show the start of charging. If the scooter does not turn on or flashes red, then there is a connection problem. In this case: Turn off the charging and re-remove the deck. Check if the connector is sitting tightly. JST. Check the contacts on the control board, they may have oxidized. If done correctly, the scooter should charge and turn on without errors. First trip take a short distance to ensure the stability of the work. 💡After replacing the battery, reset the statistics in the Mi Home app (Battery section). This will help to correctly calibrate the charge indicator. Typical errors and how to avoid them Even experienced masters sometimes make mistakes when replacing the battery in Xiaomi M365. Here are the most common of them and ways to prevent them: Error Consequences How to avoid Using metal tools to tweak the deck of the scratch on the case, damage to the latches Use only plastic blades Unscrew the screws with the wrong screws Breaks the slag, screws have to drill the PH2 cross screwdriver with a magnetic tip Disconnect the connector JST wires Break the wires, short circuit Take only the plastic case of the connector Installation of the battery with another voltage Exit from the screwd, screwdrivert the new battery before the battery is tested and the final voltage. For example, if you have installed a larger battery but have not updated it. BMS, The scooter may not display the charge level correctly, and in this case, the firmware through Mi Scooter Tools (the Android app) will help. If the scooter becomes worse to accelerate or discharge quickly after replacing the battery, check the scooter: 🔌 Quality of contacts - perhaps connector JST I didn't get into the nest. 🔋 The state of the new battery – some cheap counterparts have an understated real capacity. 📱 In-app settings — reset the battery calibration in Mi Home. If you're not sure about your abilities, you better contact the service. The average cost of replacing a battery in a workshop is 3000-5000 rubles (excluding the battery price), which is cheaper than repairing a burned-out controller due to improper connection. FAQ: Frequent questions about battery replacement in Xiaomi M365 Can the battery be replaced with a larger one (for example, 48V instead 36V)? Technically yes, but this will require replacement of the controller and firmware, as the standard BMS M365 Does not support the voltage 42V. Without modifications, the scooter will either not turn on or the control board will burn. If you want more capacity, consider models like Xiaomi. M365 Pro 2 or Ninebot Max, where these batteries are installed from the factory. M365? The average lifetime of the original battery is 300-500 full charge cycles (approximately 2-3 years with regular use: 🌡️ Storage temperature (optimum 10–25)°C). 🔌 Charging mode (do not leave on charging for more than 12 hours). 🚲 Riding style (frequently abrupt accelerations reduce the life of the vehicle) If the capacity has dropped to 50% of the original, it is time to change the battery? There could be several reasons: The connector is not connected correctly - check if it sits tightly in the nest. Polarity is confused - although the connector is not connected properly. JST It's protected from improper connection, sometimes wires are tangled in the battery itself. BMS — If the new battery is not original, its control system may not be recognized by the controller. MOSFET Or chip. Diagnostics, disconnect the battery and check the multimeter voltage on the control board (between the connector contacts). If it's not there, the problem is the controller. Can you charge the scooter without the battery (directly)? No, it's extremely dangerous. Xiaomi Control Board M365 designed to work with the battery, and the direct connection of the charger to the contacts will lead to: ⚡ Short circuit and fire. 💥 Charger failure. 🔥 If you need to test a board without a battery, use a laboratory power supply with a current limit of 1-2 A and a voltage of 36-42 V. Where to buy the original battery for Xiaomi M365? The original batteries can be found: 🛒 Xiaomi’s official stores (such as Mi Store or Xiaomi Shop). 🌍 AliExpress (sellers with a rating above 98% and reviews of compatibility with the company) M365). 🔧 Service centers - sometimes sell used batteries after repair. The cost of the original battery - 8000-12,000 rubles. Analogues from Baseus or Green Cell will cost less (5000-7000 rubles), but their quality may be lower.