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Samsung 40T 21700 4000mAh Battery


The Samsung 40T out-performs every 18650 and 20700 in regulated devices up to about 20A-25A (60-75W). It's an excellent balance between power and capacity, and is currently among the top 21700 cells on the market!


  • Dimensions : 70.2mm (L) x 21.1mm (D)
  • Weight : ~66.87g
  • Typical Capacity : 4000mAh
  • Protected: NO, UNPROTECTED
  • Max Continuous Discharge Rate: 35A
  • Voltage : 3.6V
  • Full Charge Voltage : 4.2V