Q. What should I do if my Sumatotek Battery has been damaged by Liquid/Water?

A. If your SUMATOTEK Lithium Battery has come in contact with water, please take it immediately to your nearest dealer and inform him of the same. If you do not take action immediately and wish to delay or not report the incident to the dealer it may damage your SUMATOTEK Lithium Battery permanently. The dealer will take immediate action and ensure that the water doesn’t stay inside the battery. He will open the battery and dry it completely from inside out. He may also need to send the battery immediately to the SUMATOTEK Company Service Center for a thorough checkup. Keep in mind, Fast Action may save your battery. But if you do not report it then the damage due to water retained inside the battery will be permanent and your battery may not be repairable.

NOTE : Once water goes inside the battery by any means, intentional or accidental your battery will be out of warranty but note that we will try our level best to repair it at a nominal cost after the permission of the customer and all charges are to be borne by the customer in that case.

Q. How can a Lithium Battery catch Fire? And How can we prevent this?

Please watch this video on our channel by OKOYAMA Electric Scooters. It explains in detail on how, Electric Scooters Catch Fire.
A. Lithium-ion Batteries, or Secondary Batteries, are rechargeable and provide high energy density. These batteries contain no free Lithium metal but do contain Lithium Ions and highly flammable electrolytes. Common applications that incorporate li-ion technology include laptops, cell phones, electric vehicles, hospital equipment, and energy storage systems, Electric Vehicles to name a few. If you visit the Wikipedia page for Lithium Ion Batteries it contains a list of the various type of batteries in this category based on their different cathode material :

  1. Lithium Polymer Battery
  2. Lithium Cobalt Oxide
  3. Lithium Iron Phosphate
  4. Lithium Manganese Oxide
  5. Lithium Nickel Manganese Cobalt Oxide

All these batteries operate on a similar principle of a cathode, an anode, and an electrolyte.

Lithium batteries are capable of spontaneous ignition and subsequent explosion from overheating. That may be caused by –

  1. Electrical Shorting
    1. Due to external shorting of wires within the Electric Vehicle wiring.
    2. BMS Failure in which the BMS is shorted internally due to a component failure.
  2. Rapid Discharge
    1. It can happen when the vehicle is overloaded or is carrying weight beyond its rated Capacity.
    2. The vehicle is very old and unmaintained and thus it draws more current than required.
  3. Overcharging
    1. It can happen due to use of Over Rated Charger or use of LEAD ACID Chargers with Lithium Batteries.
    2. It can happen due to the malfunctioning of charger leading to a higher than rated voltage.
  4. Manufacturers Defect
    1. Missing insulation between cells to provide for proper protection from inter heating or shorting exchanges.
  5. Poor Design
    1. If the battery box is sealed without proper heat dissipation then temperature could rise within the cabinet when the battery is charged or discharged. Using high current fast chargers can also increase the battery temperature, while heavy loading on a long trip could also increase the battery temperature significantly. With no vent for hot air inside the battery box, temperatures could rise significantly leading to a thermal runway condition.
    2. The BMS also heats up significantly therefore proper heat sink must be provided to the BMS with vents for the hot air to escape.
  6. Mechanical Damage
    1. If any cell is punctured then it could heat up and start a spontaneous fire. It could happen due to transportation damages or any accidental damages.

      Overheating results in a process called Thermal Runaway, which is a reaction within the battery causing internal temperature and pressure to rise at a quicker rate than it can be dissipated.


      Lithium Battery fires are rare but they can range from minor sparks to deadly explosions. As all technologies we use in our day to day life, we all need to be aware of the hazards of lithium batteries which will lead to fewer fire cases. Follow these precautions to prevent a lithium battery fire incident.

      1. To prevent Electrical Shorting : always get a trained technician to wire SUMATOTEK Battery to your vehicle. Take care that there should not be any loose wires in the vehicle which can cause an electrical short.
      2. To prevent Rapid Discharge : always drive the vehicle at a nominal speed. Do not accelerate or increase the speed quickly. It is recommended that you drive slow specially with heavy loads or multiple passengers. Always service your vehicle at regular intervals to prevent excess current being drawn by motor and controller.
      3. To prevent Overcharging : always use a authenthic SUMATOTEK Charger with SUMATOTEK Batteries. You can find the max charging voltage mentioned in the product description of all our products.

Q. I have received 2 connectors with my newly purchased SUMATOTEK Lithium Battery and Charger. What should I do with them or how should I use them with my Electric Scooty?

A. First of all, congratulations on your newly purchased SUMATOTEK Lithium Battery and Charger. When you unbox your battery and charger you may find 1 or 2 types of connectors within the package contents depending on your choice of items during purchase.

  1. Industrial Connector: Discharging / Charging
  2. 3 Pin Socket: Charging Only

    The 1st connector or the Industrial connector is a 50A rated heavy discharge connector suitable for heavy load applications. Use this connector to attach the SUMATOTEK Lithium Battery to the Electric Scooter. This connector will be connected to the Positive and Negative Battery connections of the controller.
    In the case of an old model Electric Scooter, these Positive and Negative Battery connections are the same that were previously connected to the GEL Batteries. Note that in the case of GEL Batteries there are 4/5/6 batteries connected in series and therefore you will find the Positive connection at the Positive Pin of the 1st Battery and the Negative connection at the Negative Pin of the Last Battery (4/5/6th Battery for 48V/60V/72V respectively).
    Do not forget to insulate the connection before you connect the battery and always remember to turn off the MCB and then connect the battery.

    The 3 Pin Socket is an additional socket that may or may not come to your use depending on the model of the Electric Scooter you are using at the moment. This connector is provided to replace the charging socket provided below the seat which is used to charge the battery without opening the scooter seat or the boot space. Different vehicles have different wiring connections. The connector has 3 terminals but only 2 are used. The polarity of the connector is given in the product’s description.
    Once you have installed the 3 Pin Socket always remember to check the polarity of the charger and the 3 Pin Socket and ensure that the positive pin of the charger goes into the positive pin of the connector. If the connections are reversed then the charger may get damaged and such chargers are not covered under warranty.
    Do not use the 3 Pin Socket for discharging the battery. It has a maximum rating of 10A and may pose a fire risk due to excessive heat if loaded with high currents.

Q. Should I water wash my Electric Scooty? How will it affect my Warranty?

A. No and Yes. If you are confused then let us clear your confusion.
You should not water wash your vehicle with your SUMATOTEK Battery inside the vehicle. Lithium Batteries can be permanently damaged if exposed to water. You can read our blog for the detailed effects of Water on Lithium Batteries.

However, you can water wash your vehicle without the SUMATOTEK Battery inside. As a precautionary step, you should take out the battery, keep it in a safe, cool place, and then wash the vehicle. Also keep in mind that very high pressurized water jets can also get inside the motor if the motor fittings are loose. This happens rarely but it is possible, Install the SUMATOTEK Battery only when the vehicle is completely dry.

If you wish to clean the SUMATOTEK Battery, then use a slightly wet cloth or an Ethyl alcohol/water mix cloth to wipe the battery clean.

Please note that the Warranty of SUMATOTEK Battery is void in case of liquid damage or liquid ingression.

Q. How do I register my newly purchased SUMATOTEK Lithium battery for Warranty?

A. First of all, Congratulations on being a proud owner of SUMATOTEK Lithium Battery. In order to register for warranty follow the following steps:

Sumatotek Lithium Battery Warranty Registration Poster - 3 Simple Steps
Sumatotek Lithium Battery Warranty Registration – 3 Simple Steps
Sumatotek Warranty Registration Mobile View
  1. Open the company website @SUMATOTEK.
  2. Now you need to login into your SUMATOTEK Account to register for your warranty.
    • Desktop View: Click on the “My Account” tab on the top right corner of the homepage.
      • Create your new account or log into your existing account with your username, password or by using social login.
      • Once you have logged in to your SUMATOTEK Account, you need to click on “Warranty Registration“. You can find this in your My Account menu located on the right-hand side hand of the “My Account” Page.
      • After you have clicked on the Warranty Registration menu, you can see that your name, email, and phone numbers are auto-filled from your profile details. You can edit them if you like.
      • Fill out the remaining details.
    • Mobile View: Click on the “My Account” tab on the left bottom corner of your Phone Screen.
      • Create your new account or log into your existing account with your username, password or by using social login.
      • Once you have logged in to your SUMATOTEK Account, you need to click on “Warranty Registration“. You can find this in your My Account menu located in the middle of the screen and 6th after the “Account Details” tab.
      • After you have clicked on the Warranty Registration menu, you can see that your name, email, and phone numbers are auto-filled from your profile details. You can edit them if you like.
      • Fill out the remaining details.