The Efest IMR 21700 3700mAh vape batteries combine impressive power output with a high capacity.
Designed for vape devices and kits that support 21700 batteries, we always recommend you check compatibility before use.
these batteries feature a 3700mAh capacity, with a 40A Pulse Discharge Rate and a 35A Continuous Discharge Rate.
Check out our Battery Safety Guide for tips on keeping your batteries in tip-top condition.
Please Note: The Pulse Discharge Rate refers to the maximum output of a fully charged battery, the Continuous Discharge Rate refers to the maximum power output of a battery regardless of its level of charge.
We always recommend that you do not attempt to work outside of the max Continuous Discharge Rate when using these batteries with an unregulated or regulated vape device.
THERE ARE RISKS ASSOCIATED WITH THE SPECIALIST BATTERIES USED IN E-CIGARETTES. YOU MUST FOLLOW THESE SAFETY REQUIREMENTS. WE WILL NOT BE LIABLE FOR DAMAGE CAUSED BY IMPROPER USE OR STORAGE OF BATTERIES.
If liquid leaking from a battery gets in your eyes, don’t rub your eyes, wash them with clean water and seek medical attention immediately. Ensure that the battery is disposed of immediately and that any liquid that has leaked from the battery is contained and removed as it may cause explosion or fire.
Each country has its own rules on the disposal of batteries. Please ensure that you dispose of the batteries in accordance with local regulations.
For more information about battery safety please see our Safety Tips For Vape Batteries.
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By Sam from London
These are good as a 2nd set of 21700's. They do not drain equally on the set I bought, they do last a good while though. Worth considering if on a budget or as a backup set
By Gers1872 from Fife
Great battery, very safe long life, i get two days out of this battery no problem at all. Charges reasonably fast aswell. Also comes with a free rubber vape club battery case aswell which was nice.
By bagmagtag from basingstoke
Had these for a while now and they last nearly the whole day. Free rubber battery protectors are a nice touch
By Giles from Sussex
No complaints at all. The charge lasts a long time, and they're very safe. Exactly what you want from a vape battery.
By MARTIN from GLASGOW
this is the best battery i have purchased the life is good on it and actually charges back up really fast also,, loving the free case that was send also..