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The latest in battery technology from Efest. This is the new 2021 version of the 3500mah from Efest which has improved performance over the previous model released in 2016. This battery is perfect for any mod kit. Such as Vaporesso, VooPoo, SMOK, etc.

This is the highest capacity battery we have. The trade-off for capacity is that this battery cannot be used in high draining vape devices such as mechanical mods or hybrid mods. These batteries have only a 10A continuous discharge and 20A burst discharge.


  • Nominal Voltage: 3.7v
  • Nominal Capacity: 3500mah
  • Max Current Draw: 10a Constant / 20a Burst
  • Discharge Voltage: 2.5v
  • Max Charge Current: 4a
  • Charging Temperature Range: 0-45 Degrees Celsius
  • Discharge Temperature Range: -20-70 Degrees Celsius
  • Internal Resistance: 20 milliohm
  • Dimensions: 18.5mm +/- 0.2mm (Diameter) x 65.2mm +/- 0.2mm (Length)
  • Chemistry: Li-Ion / IMR

Package Contents

  • 1x Efest 18650 3500mah Battery
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