Test/review of Keeppower 18650 3500mAh P1835K (Black) 2019

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HKJ
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Test/review of Keeppower 18650 3500mAh P1835K (Black) 2019

Keeppower 18650 3500mAh P1835K (Black) 2019
DSC_6853
Official specifications:


  • Capacity min.: 3350mAh
  • Capacity typ.: 3500mAh
  • Nominal voltage: 3.70V
  • Charge voltage: 4.20+/-0.05V
  • Standard discharge cut-off voltage: 2.50V
  • Standard charge current: 1700mA
  • Charge termination current: 50mA
  • Max. continuous discharge current: 8A

Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-info
This is a 3500mAh protected 18650 battery from Keeppower.
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DSC_6854 DSC_6855
DSC_6856
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Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-Capacity
The two cells match very nicely. At continuous 7A the protection trips before the batteries are empty.
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-Temp-5.0
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-Temp-7.0
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-CapacityTimeHours
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-CapacityTime
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-Energy
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-PowerLoadTime
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-TripCurrent
Keeppower%2018650%203500mAh%20P1835K%20(Black)%202019-Charge
Keeppower%2018650%203500mAh%20P1835K%20%28Black%29%202019-Pulse-1.0A-10-10-2.8V-IR
Conclusion
This is very good quality protected batteries and one of the highest capacity 18650 batteries available.
Notes and links
The batteries was supplied by Keeppower for review.
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
Graphical comparison to 18650 and other batteries
Table with all tested LiIon batteries

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

mcfarlie6996
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Last seen: 3 weeks 19 hours ago
Joined: 07/26/2014 - 13:58
Posts: 122
Location: Arizona

Considering this is (assumingly) a 10A battery underneath, I’m a little disappointed that it tripped at 7A, especially since it’s claiming 8A continuous. They should have programmed it to not trip until 9 or 10 amps to get more possibilities of uses in individual flashlight models. Aside from that, still an excellent battery in all other aspects. Thank you for your review!!