Test / Review: Efest IMR14500 V1 700mAh (Red)

3 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 2 days 21 hours ago
Joined: 05/24/2011 - 12:23
Posts: 7453
Location: Copenhagen, Denmark
Test / Review: Efest IMR14500 V1 700mAh (Red)

Efest IMR14500 V1 700mAh (Red)

DSC_0549

Official specifications:

  • Nominal Voltage: 3.7v
  • Battery Model: 14500 V1 Capacity: 700mAh
  • Positive: Flat top
  • Cycle Life: 500 Cycles
  • Max Charging Rate: 4.5amps


Efest%20IMR14500%20V1%20700mAh%20(Red)-info

DSC_0513 DSC_0548

I got a pile of batteries in one envelope, not the best way to ship batteries, even when they are shrink wrapped. Efest have changed their packing.

DSC_0550 DSC_0551

DSC_0553
DSC_0554
DSC_0555

Efest%20IMR14500%20V1%20700mAh%20(Red)-Capacity

The tracking between the batteries are not perfect, this is probably related to the bump in the discharge curve for the A battery.

Efest%20IMR14500%20V1%20700mAh%20(Red)-CapacityTimeHours

Efest%20IMR14500%20V1%20700mAh%20(Red)-CapacityTime

Efest%20IMR14500%20V1%20700mAh%20(Red)-Energy

Efest%20IMR14500%20V1%20700mAh%20(Red)-PowerLoadTime

Efest%20IMR14500%20V1%20700mAh%20(Red)-TripCurrent

Efest%20IMR14500%20V1%20700mAh%20(Red)-Charge



Conclusion

These IMR batteries have good performance at high loads, 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
Comparison to other LiIon 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
Match
Match's picture
Offline
Last seen: 6 years 1 month ago
Joined: 11/14/2010 - 11:57
Posts: 1488
Location: South Carolina, USA

Thanks again for running all these tests HJK!  It's an outstanding reference when one searches for new cells.

I'm glad to see some more action in the 14500 IMR category, even if they aren't overachievers.  I'm assuming they're priced pretty competitively?

sb56637
sb56637's picture
Offline
Last seen: 3 hours 16 min ago
Joined: 01/08/2010 - 09:29
Posts: 7179
Location: The Light

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

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