Samsung 40T 4000mAh 21700 Battery



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THE SAMSUNG 40T BATTERY, is one of the top performing 21700 series batteries from their range. The Samsung 40T is an amazing battery which and performs closely to the Samsung 30T in terms of overall power, while offering a superior 4000mAh of capacity.

  • Main Features & Specifications
    • Battery Series: 21700 
    • Model: 40T
    • Chemistry: INR
    • Style: Flat Top
    • Protected: No
    • Capacity: 4000mAh
    • Capacity (STD Discharge): 3900mAh
    • Current (Max Discharge): 30A
    • Voltage (Nominal): 3.6V
    • Voltage (Peak): 4.2V
    • Dimensions:
      • Diameter: 21.1mm
      • Length: 70.4mm
    • Colour: Purple
    • Weight: 80g
    • Samsung Datasheet & Specifications Download




        General Battery Safety

        Battery safety is very important. Mistreated batteries can get extremely hot and/or vent which could cause injury. Always follow the following rules to make sure this doesn't happen. We are not liable for mistreated batteries.

        • Never completely discharge batteries (below 2.5V under load or 3V unloaded)
        • Charge fully (to 4.2V) before first use
        • Never use a lot of force on the battery to install
        • Use only high quality battery chargers
        • Do not expose to heat
        • Do not connect the positive contact to the negative contact without an appropriate load
        • Be mindful of the current limits in the specification and never exceed them
        • Never keep spare battery or batteries loose in or near;
          • Pocket etc
          • Purse etc
          • Vehicle glovebox or console compartment, in fact never in a vehicle
          • Direct sunlight
          • Machinery
          • Fire or heat sources
        • If storing batteries short or long term, use these guidelines
          • Use a battery model specific protective case
          • Use a cool & dry environment
          • Don not store fully charged, approximately 3.6~3.7V is best
        • Never try to charge or discharge li-ion batteries with battery chargers that are not made for Li-ion batteries
        • Never charge battery 4.3V or above
        • Do not charge unattended
        • Do not store your li-ion batteries fully charged for an extended period of time (weeks or more)