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  • 21700 3750mAh Battery by iJoy

(1) 21700 3750mAh Battery by iJoy

  • 21700 3750mAh Battery by iJoy
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21700 3750mAh Battery by iJoy

Well, what can I say about this battery? It’s round, it powers mods that have the ability and room to accept it for what it is and it’s rechargeable. Pretty dang exciting… It’s really cool that we finally got these in though because they are really hard to find. Your welcome and don’t forget to Vape and be Happy.

21700 3750mAh Battery Features:

  • Brand: iJoy
  • Size: 21700
  • Chemistry: INR
  • Nominal Capacity: 3750mAh
  • Nominal Voltage: 3.7V
  • Discharge: 24A Max Continuous, Rated 40A Max Pulse by iJoy
  • Positive Connection Shape: Flat
  • Protected: NO, UNPROTECTED
  • Rechargeable: Yes
  • Dimensions: 21.6mm x 70.5mm
  • Weight: 69.94g

21700 3750mAh Battery Package Contents:

  • (1) 21700 3750mAh Battery by iJoy

Important Battery Information:


  • DO NOT transport without a protective case
  • DO NOT transport loose in any pockets, backpacks or purses
  • To avoid serious injury and burns, always keep batteries away from contact with metals, and store in a plastic case
  • Never completely discharge li-ion battery ( below 2.7V under load ).
  • Charge fully to 4.2V before first use.
  • Never attach any metal moving parts |magnet| to the top-positive, or the bottom-negative battery contacts.
  • Never use force to install (insert) li-ion battery.
  • Do not use new and old battery cells together | Does not apply for one cell devices.
  • Use only high quality battery charger.
  • Do not expose to heat.
  • Do not short (connect) positive (top), and negative (bottom) battery terminals (contacts).
  • Keep battery that is not in use in plastic holder (or any insulating [plastic] container completely sealed).
  • Do not charge battery over 4.29V (another reason to use high quality battery charger).
  • Do not charge unattended.
  • Do not use old, and new cells together.
  • Do not store your li-ion batteries fully charged (for extended period of time).
  • Store in cold and dry place at approximately 3.7V (storage charge).
  • After battery is discharged – don’t leave it discharged=>charge it as soon as possible.


  • Do not overdischarge/overcharge 
  • Recharge drained batteries ASAP 
  • Do not short circuit 
  • Do not dispose of in fire 
  • Do not expose to extreme heat or water 
  • Please be familiar with handling lithium-ion batteries before purchase

The improper use or storage of any lithium ion rechargeable battery cells may pose a SERIOUS RISK of personal injury or property damage.  VAPEHAPPY accepts no responsibility or liability for any injury, damage, or defect, permanent or temporary that may be caused by the improper use of a LI-ION battery. You are responsible to have a basic knowledge of the batteries you are using and how to care for them properly.

Visual Battery Warning

(1) 21700 3750mAh Battery by iJoy has a rating of 5.0 stars based on 4 reviews.

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