Test/review of UltraFire 14500 750mAh (Black-red)

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HKJ
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Location: Copenhagen, Denmark
Test/review of UltraFire 14500 750mAh (Black-red)

UltraFire 14500 750mAh (Black-red)
DSC_9421
Official specifications:


  • Battery Capacity (Mfg Rated): 750 mAh
  • Battery Chemistry: Li-Ion
  • Battery Feature: Rechargeable
  • Battery Form Factor: BRC 14500
  • Battery Rated Voltage: 3.7 V

UltraFire%2014500%20750mAh%20(Black-red)-info
This is a new series of Ultrafire batteries with protection at the top.
DSC_9420
DSC_9422 DSC_9423
DSC_9424
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UltraFire%2014500%20750mAh%20(Black-red)-Capacity
The battery have the rated capacity and even a bit more, but it cannot deliver that much current.
UltraFire%2014500%20750mAh%20(Black-red)-Temp-1.0
UltraFire%2014500%20750mAh%20(Black-red)-Temp-2.0
UltraFire%2014500%20750mAh%20(Black-red)-CapacityTimeHours
UltraFire%2014500%20750mAh%20(Black-red)-CapacityTime
UltraFire%2014500%20750mAh%20(Black-red)-Energy
UltraFire%2014500%20750mAh%20(Black-red)-PowerLoadTime
UltraFire%2014500%20750mAh%20(Black-red)-TripCurrent
The cell has a protection circuit or at least something at the front of the battery, but looking at this curve it do not look like the protection tripped. It looks more like the voltage dropped due to overload.
UltraFire%2014500%20750mAh%20(Black-red)-Charge
Conclusion
Ultrafire is usual not a good brand. These cells have the rated capacity, but are not good at delivering current and the protection is doubtful.
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/

Splott-Light
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Joined: 08/20/2015 - 20:15
Posts: 254
Location: Just Outside of England

Hi. HKJ,

Thanks for your efforts in testing these.

More to avoid!

Cheers,
Splott-Light Smile

Ouchyfoot to a New Member: Welcome CJ. Now you have to learn about buying an inexpensive flashlight and modifying it until it either blows up, or starts small fires on the moon…………

Hugh Johnson:
I, too, once lived a tragic and empty life. Then I found [portable] light.
You forgot to mention clothes. I sold most of my clothes to fund my light collection. This is actually fine, since I only go out after dark, and most people can’t see me.
Finally, I got my priorities straight.