IMREN - 21700 [Gold] 3750mAh 40A Flat Top Battery

by Imren
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3 reviews

IMREN - 21700 3750mAh 40A High Drain Battery

A budget battery that packs a punch at an affordable cost, this cell from IMREN provides a nominal capacity of 3750mAh and a discharge rating of 40A, making for a competitive option that broadens the rather limited 21700 market. Available at a lower cost than the batteries offered by major electronics manufacturers, the IMREN 21700 cell is a perfect choice for those just dipping their feet into the pool of 21700 mods, allowing for more performance to be wrung out a single cell than is possible for a typical 18650 format.

Price Shown is for a Single (1) Battery.


  • Nominal 3.7V rating
  • Maximum voltage of 4.2V
  • Nominal 3750mAh capacity
  • 21700 format
  • 40A discharge rating


  • 1x IMREN 20700 3.7V 3200mAh 40A cell

To ensure your safety and maintain the battery’s life and durability, we recommend you follow these rules:

  • Do not over-discharge or overcharge the battery. Doing so will shorten the battery’s life and sometimes, it can make it pop or leak.
  • Please do not short circuit or it will release massive current.
  • Do not play with fire! Do not dispose any kind of battery in or near any fire.
  • Do not stack more than one battery as it may potentially blowout and cause serious damage to yourself and place. Notes: We do not recommend stacking more than one battery in your device because it may potentially blowout and cause serious harm.

This product is for advanced user only! Please have a great understanding and technical knowledge on how to use this product in order to properly use it. Use it at your own risk!

Note: There is always an inherent risk when using any rechargeable batteries at anytime and under any circumstances. and any of’s parent and subsidiary companies are not held responsible for any damage for any modification of the batteries, chargers, devices and other products that we carry in any form or shape, this is including pack making. and any or all of’s parent and subsidiary companies will not be held responsible or liable for any injury, damage, or defect, permanent or temporary that may be caused by the improper use of a Li-ion (Lithium-ion), LiPo (Lithium-ion Polymer) and any rechargeable battery/batteries as well as chargers. Please have a greater understanding of the batteries/chargers you are using and how to care for them properly.

When working with Li-ion (Lithium-ion), LiPo (Lithium-ion Polymer) and any rechargeable cells, please be cautious and carefully use as they are very sensitive to charging characteristics and may explode or burn if mishandled. Please make sure that you have great knowledge on all rechargeable batteries before you use them. Always charge batteries at the clean and fire-proof surface. Never leave charging batteries unattended. If you see that there are visible damages on the batteries, please do not use. Always keep, store and transport the rechargeable cells in a safe, non-conductive container in controlled environment

Do not use any rechargeable battery as well as any battery charger if any visible damage is present, as well as if the cell or charger has been stressed through mishandling, accidental or otherwise, even if damage may not be visible. Always store and transport rechargeable cells in a safe, non-conductive container in a controlled environment. Please dispose battery cells, chargers or any other electronic devices in accordance of local laws and mandates.

Customer Reviews
4.3 Based on 3 Reviews
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Verified B.
Work great .

Very good battery keep good charge

Verified B.
Great batteries .

Great battery that’s long lasting and works great in my Mage217. Just baught two more for back up batteries.

Thomas M.
Austin, Texas
Great device

Great battery that’s long lasting and works great in my Mage217. Just baught two more for back up batteries.