Test/Review of Efest 14500 800mAh (Black) 2014

HKJ

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,714
Location
Copenhagen, Denmark
[size=+3]Efest 14500 800mAh (Black) 2014[/size]

DSC_4111.jpg


Official specifications:
  • Weight: 55g
  • Length: 49.11mm
  • Diamter: 14.15mm
  • Top: Button top
  • Bottom: protected
  • Typical Capacity: 800mAh
  • Min capacity: 800mAh
  • Max discharge current: 3A
  • Max charge current: 3A
  • Recommended Max Discharge: 1.68A (2C)
  • Cycle life: 300 times
  • Normal Voltage: 3.7V
  • Full Charge voltage: 4.2V
  • Dishcarge temperature range:-10°C—60°C
  • Charge temperature range: 0°C—40°C
  • Storage: 1 year:-20°C—25°C, 3 months:-20°C—45°C, 1 month:-20°C—60°C

Efest%2014500%20800mAh%20(Black)%202014-info.png


This battery is a protected battery.

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DSC_4113.jpg


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Efest%2014500%20800mAh%20(Black)%202014-Capacity.png


The performance is fairly good, but with a mismatch in capacity.

Efest%2014500%20800mAh%20(Black)%202014-CapacityTimeHours.png


Efest%2014500%20800mAh%20(Black)%202014-CapacityTime.png


Efest%2014500%20800mAh%20(Black)%202014-Energy.png


Efest%2014500%20800mAh%20(Black)%202014-PowerLoadTime.png


Efest%2014500%20800mAh%20(Black)%202014-TripCurrent.png


Efest%2014500%20800mAh%20(Black)%202014-Charge.png




[size=+3]Conclusion[/size]

A acceptable battery, that can deliver up to about 2A.



[size=+3]Notes and links[/size]

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
 
candle lamp

candle lamp

Flashlight Enthusiast
Joined
Jun 16, 2010
Messages
1,572
Location
South Korea
Excellent review. HKJ! :thumbsup: Thanks again.

Does the over-discharge protection kick in at 3.0A?
 
tobrien

tobrien

Flashlight Enthusiast
Joined
Dec 16, 2005
Messages
4,861
Location
Georgia Highway 441
I would say production tolerances, both placement and size of heatshrink has combined to do this.

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DSC_4444.jpg

ah gotcha, I didn't think about that. What got me curious was how I've never had that experience on such covering with AW or Redilast cells, for example.

thanks for the quick reply by the way ;)
 
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