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Samsung 40T 21700 4000mAh 35A Li-Ion Battery

4.77 out of 5
(13 customer reviews)

Samsung has really hit some “Grand Slams” just in the past couple of years with Li-Ion cells, this Samsung 40T is just one of those examples. What makes this cell so special is it’s ability of having “Maximum Balance” with Very High Capacity and while having Ultra-High Discharging/Drain capabilities without any compromise, this was previously thought to be impossible as you have only so much room in a cell for either Capacity or High Drain, Not both.


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SKU: 1994 Category:


These authentic Samsung cells are some of the highest quality 21700 batteries out there. These batteries are used for many applications.


  • Model: 21700
  • Lithium Ion
  • Nominal voltage: 3.6V
  • Discharge cut-off voltage: 2.5V
  • Nominal discharge capacity: 4000mAh
  • Charge: 1.50A, 4.20V,CCCV 150mA cut-off
  • Discharge: 0.2C, 2.5V discharge cut-off
  • Standard charge: CCCV, 1.50A, 4.20 ± 0.05 V, 150mA cut-off
  • Rapid charge: CCCV, 4A, 4.20 ± 0.05 V, 100mA cut-off
  • Charging time: Standard charge : 180 min / 150mA cut-off Rapid charge: 70 min (at 25 °C) / 100mA cut-off
  • Max. continuous discharge: 15A(at 25°C), 60% at 250 cycle
  • Cell weight: 68.2g
  • Cell dimension: 21.1mm x 70.4mm

Samsung 40T Datasheet


  • 1 x Samsung 3.7v 21700 4000mAh Lithium Ion Battery

Additional information


Battery Size

13 reviews for Samsung 40T 21700 4000mAh 35A Li-Ion Battery

  1. 5 out of 5

    Ron Lock (verified owner)

    Speedy delivery! Batteries were reading 3.3V on arrival but after charging were reading 3.7V as expected. Good. Thanks very much. I am going to order some more.

  2. 5 out of 5

    Tristan Rudden (verified owner)

    Genuine. Well packaged.

  3. 4 out of 5

    Samuel G. (verified owner)

  4. 5 out of 5

    Anonymous (verified owner)

    Fast and as ordered

  5. 5 out of 5

    John R. (verified owner)

    Great batteries and great service from KiwiQuads

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