HKJ
(HKJ)
July 25, 2019, 5:10am
1
Keeppower 18650 3500mAh P1835J (Black) 2019
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: 1500mA
Charge termination current: 50mA
Standard discharge current: 3400mA
Max. continuous discharge current: 8A
This is a 3500mAh protected 18650 battery from Keeppower.
The two cells match very nicely. At continuous 7A the protection trips before the batteries are empty.
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
Thanks for the review HKJ! I went to check you comparator and comparing this KP with the Samsung INR18650-35E 3500mAh (Pink), the Samsung still beats this one in terms of capacity and drain (low and high Amps).
Would you considerer it “the best” 18650 regarding to capacity? Or will the Sanyo “beat” it?
HKJ
(HKJ)
July 25, 2019, 5:26pm
3
MascaratumB:
Thanks for the review HKJ! I went to check you comparator and comparing this KP with the Samsung INR18650-35E 3500mAh (Pink), the Samsung still beats this one in terms of capacity and drain (low and high Amps).
Would you considerer it “the best” 18650 regarding to capacity? Or will the Sanyo “beat” it?
The Samsung will have higher voltage when drawing current, because it is unprotected.
The cells are very similar, at least when new.
Thanks HKJ! Your work is very appreciated. Looks like another solid offering from KeepPower.
SubLGT
(SubLGT)
October 20, 2019, 7:18am
5
This same model, #P1835J , was tested back in 2015:
Keeppower 18650 3500mAh (Black) 2015
[image]
Official specifications:
Capacity min.: 3400mAh
Capacity typ.: 3500mAh
Nominal voltage: 3.70V
Charge voltage: 4.20+/-0.05V
Standard discharge cut-off voltage: 2.50V
Standard charge current: 1000mA
Charge termination current: 50mA
Standard discharge current: 3400mA
Max. continuous discharge current: 8A
[image]
This is a protected high capacity cell.
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Very nice curves w…
The latest version handily outperforms the 2015 version, as seen in the 7A discharge curve. I don’t know what cell the 2015 version was using, but the current version of P1835J appears to have discharge curves very similar to the Sanyo NCR18650GA. The Samsung 35E curves also look similar, but I think the GA discharge curves are a slightly better match.
gilson65
(gilson65)
April 13, 2020, 12:00am
6
The earlier versions had the year printed on them how do I know what version I have if the year is not printed on them now thanks