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Efest IMR 1100mAh 3.7v 18490 Button Top Battery

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Your Price:
$6.99 (You save $3.00)
1.00 Ounces
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Product Description

Price is for ONE Battery

Safe chemistry LiMN 3.7V rechargeable battery is now available in 18490 size. Can be charge with any LiIon battery charger with 4.2V output.


Nominal Voltage: 3.7v
Battery Model: 18490 Capacity: 1100mAh
Positive: Nipple Top
Cycle Life:500 Cycles
Weight: 45g

Dimensions: 48.89mm (L) x 18.19mm (D)

- Do not over-discharge/overcharge
- Recharge empty batteries ( resting voltage ~3.6V ) as soon as possible. Leaving LiIon batteries in discharged state will incur irreversible damage ( capacity / cycle loss )
- Do not short circuit ( will release tremendous current )
- Do not dispose of in fire.

Attention : These IMR cells have much lower internal resistance than regular LiIon 3.7V cells and they may end up with a higher ending voltage when charged in certain chargers ( especially older version WF-139 charger ). Please check the voltage of them right out of the charger to see if they are above 4.20V when fully charged with your charger. Overcharging above 4.25V may shorten life/cycles. Above 4.50V may even pop them or making them leak. DO NOT use the charger if it seems to overcharge IMR cells.


Although we carry all kinds of batteries, if you are using a High Drain or Variable Voltage device, like the Tesla, we recommend you use IMR Batteries.

We also DO NOT under any circumstances recommend the practice of "stacking" batteries in any of our mods or PV units. Not all batteries work well for all devices, if you are unsure, just send us an email or visit the ECF forums for more information on battery usage.
Please read again..

DO NOT under any circumstances stack two batteries for any reason in any device we sell our current line up is NOT capable of handling blowouts from the use of two batteries and you can be seriously harmed by stacking batteries in mods.

Please download and read this document:
Lithium-Ion Battery Hazzrd and Use Assessment

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Product Reviews

  1. Aww it's so cute

    Posted by Robert on 19th Sep 2013

    This was my first 18350 as well as my first efest. For the price this is a great value, though I think I do prefer the aw imr. All in all though it seems to fire well and the life after fully charging is good.