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Quick Details

  • Brand Name: Efest
  • Model Number: 3682
  • Use: Standard Battery, 18350/18650/26650/17650 and so on
  • Type: Electric
  • Place of Origin: China (Mainland)
  • Input voltage: DC 12-24V
  • Cut-off Voltage:: 4.2V+/-0.5V
  • USB: Double USB power out .
  • Charging Mode:: 0.5/1/2A
  • Brand name: efest BIO V2

Packaging & Delivery

Packaging Details First in Efest retails packing box,then In carton

BIO 2V battery charger Cylinder battery charger best multifunctional charger


Product Description


1.Capable of charging 2 batteries simultaneously

2.With reverse polarity protection, short circuit protection, over-current protection

3.Zero voltage activation function

4.There are 2 USB sockets of DC5V/0.5A and DC5V/1A

5.Three charging modes(0.5A/1A/2A)

6.Compatible with most 3.7V Li-ion or LiMn batteries like 10440, 14500, 14650,18500, 17670, 18650, 18700, 26500, 26650 etc. It can charge 15270 or 14250 batteries with 2 pieces spacer

Input power:100-240V 50/60Hz / DC 12V 2A
Output power:4.2V - 2 X 2A / 2 X 1A / 2 X 0.5A
USB output:5V 1A / 5V 0.5A
0.5A CC current500mA ± 5%
1A CC current1000mA ± 5%
2A CC current2000mA ± 5%
Auto cut-off voltage4.2V ± 0.05V
CV cut-off current< 10% max current
Standby current< 20mA
TC current
 (battery voltage 2-2.9V)
10% max current
Activation current 
(battery voltage<2V)
10±1m A
USB output floating Voltage5.0-5.5V
USB Output floating current< 10mA
Maximum Output current1A
Battery output Cut-off voltage3.0 ± 0.05V
Auto recharge voltage3.9 ± 0.15V
Operation Temperature0°C~40°C
Storage Temperature-40°C~70°C
Certification:both RoHS and CE
Packaging & Shipping



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Transaction Overview


Transaction Details

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China (Mainland)
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