Test/review of GTL 26650 12000mAh (White)

HKJ

Flashaholic
Joined
Mar 26, 2008
Messages
9,715
Location
Copenhagen, Denmark
[size=+3]GTL 26650 12000mAh (White)[/size]

DSC_8590.jpg


Official specifications:
  • Model: 26650
  • Type: Rechargeable Li-lithium battery
  • Capacity: 12000mAh
  • Voltage: 3.7V
  • Max Continuous Discharge: 8A
  • Max Peak Discharge: 4A Peak lower than continuous?
  • Size: about 66*25*25mm
  • Colour: White

GTL%2026650%2012000mAh%20(White)-info.png


Super high capacity 26650, again a battery with wrong specifications.

DSC_8589.jpg


DSC_8591.jpg
DSC_8592.jpg


DSC_8593.jpg

DSC_8594.jpg


GTL%2026650%2012000mAh%20(White)-Capacity.png


There is significant difference between the two batteries and the capacity is 2000 and 2200mAh at low current. The batteries can handle up to about 7A.

GTL%2026650%2012000mAh%20(White)-Temp-7.0.png


At 7A the A cell get warmest.

GTL%2026650%2012000mAh%20(White)-Temp-10.0.png


At 10A it is the B cell.

GTL%2026650%2012000mAh%20(White)-CapacityTimeHours.png


GTL%2026650%2012000mAh%20(White)-CapacityTime.png


GTL%2026650%2012000mAh%20(White)-Energy.png


GTL%2026650%2012000mAh%20(White)-PowerLoadTime.png


GTL%2026650%2012000mAh%20(White)-TripCurrent.png


GTL%2026650%2012000mAh%20(White)-Charge.png




[size=+3]Conclusion[/size]

These cells where never going to be anywhere near the rated capacity, instead they have less capacity than most other 26650 cells.

I will call them bad cells.



[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
Compare to 26650 and other batteries
 

PapaLumen

Enlightened
Joined
Apr 19, 2010
Messages
801
Location
UK
Wow what terrible batteries! One to steer clear of..

Thanks for the review HKJ.
 

Thom2022

Enlightened
Joined
Dec 12, 2016
Messages
224
26650's with the performance of sub standard 18650's. That's definitely a winner........
Nice test, definitely ones to steer clear of!
 
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