Test / Review: Efest IMR18650 V1 1500mAh (Red)

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HKJ
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Test / Review: Efest IMR18650 V1 1500mAh (Red)

Efest IMR18650 V1 1500mAh (Red)

DSC_0515

Official specifications:

  • Efest IMR 18650 1500mAh Flat Top 3.7V Rechargeable LiMn Battery
  • Brand: Efest
  • Size: 18.08(L)*65.17(W)mm


Efest%20IMR18650%20V1%201500mAh%20(Red)-info

This is a high current IMR battery.

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DSC_0516 DSC_0517

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Efest%20IMR18650%20V1%201500mAh%20(Red)-Capacity

The battery handles anything up to 10A without problems, it might also work at higher current, but I have not tested it.

Efest%20IMR18650%20V1%201500mAh%20(Red)-CapacityTimeHours

Efest%20IMR18650%20V1%201500mAh%20(Red)-CapacityTime

Efest%20IMR18650%20V1%201500mAh%20(Red)-Energy

Efest%20IMR18650%20V1%201500mAh%20(Red)-PowerLoadTime

Efest%20IMR18650%20V1%201500mAh%20(Red)-TripCurrent

Efest%20IMR18650%20V1%201500mAh%20(Red)-Charge



Conclusion

These IMR batteries have good performance at any load, but the capacity is, of course, not that high.
At the current time I can only rate them acceptable, because Efest is a new company, and the batteries is not from one of the big brands.



Notes and links

How is the test done and how to read the charts
How is a protected LiIon battery constructed
More about button top and flat top batteries

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

Edited by: sb56637 on 08/26/2014 - 17:45
NightCrawl
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Thank you for the test, for that price, not much worse than AW.

Are you planning to do 15 and 20A too?

HKJ
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NightCrawl wrote:
Thank you for the test, for that price, not much worse than AW.

Are you planning to do 15 and 20A too?

Not on this set, but I got a new set of them to test (I do not know if the cell is exactly the same) and there I might do higher current.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

NightCrawl
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Is there something wrong with this set or is V2 released already?

HKJ
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NightCrawl wrote:
Is there something wrong with this set or is V2 released already?

 

Neither, but Efest send my a pile of batteries to review and there was a new 1500mAh between.

There are a few more duplicates included, I do not yet know how many (It does take some time to unpack, take photo and register the batteries). They will show up with "2013" added to the name, but might have exactly the same performance as the already tested batteries.

My website with reviews of many chargers and batteries (More than 1000): https://lygte-info.dk/

sb56637
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Thanks very much! Frontpage’d and Sticky’d.

Budget Light Forum ...where Frugal meets with Flashlight!

ChimpOnABike
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Any of the 14500’s or 10440’s in the collection they sent you? I’ve got a pair of both on order and am hoping they are going to be worth the wait.

Don’t be a chump, be a chimp!

NightCrawl
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ChimpOnABike
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Thanks!

Don’t be a chump, be a chimp!