Test/review of Keeppower 18650 3500mAh P1835U (Blue-white) 2017

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HKJ
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Test/review of Keeppower 18650 3500mAh P1835U (Blue-white) 2017

Keeppower 18650 3500mAh P1835U (Blue-white) 2017
DSC_2637
Official specifications:


  • Part No.: P1835U
  • Protected 18650 Li-ion Rechargeable Battery
  • Minimum Capacity: 3350mAh
  • Typical Capacity: 3500mAh
  • Normal Voltage: 3.7V
  • Standard Continuous Charging Current: 1.0A
  • Maximum Continuous Discharging Current: 5.0A
  • In Built Safety Circuitry
  • Protection Circuit (Against over charge, over discharge, over current and short-circuit.)
  • 4.20V maximum voltage and 2.50V cut-off voltage
  • Over 500 charge-discharge cycles

Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-info
A high capacity battery with build-in usb charger.
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Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-Capacity
The discharge curves tracks perfectly.
Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-Temp-5.0
The batteries do not get too hot at 5A. The overload protection is a bit temperature depend and one of the cells trips at 5A.
Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-CapacityTimeHours
Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-CapacityTime
Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-Energy
Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-PowerLoadTime
Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-TripCurrent
Keeppower%2018650%203500mAh%20P1835U%20(Blue-white)%202017-Charge
Keeppower%2018650%203500mAh%20P1835U%20%28Blue-white%29%202017-Charge
Charging with the build-in charger, maximum charge current is about 0.8A and maximum charge time a bit below 7 hours. Termination is around 50mA.
Conclusion
Easy to use battery with protection and build-in charger.
I will rate this a good battery.
Notes and links
The battery 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
Compare to 18650 and other batteries

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

Edited by: HKJ on 03/06/2018 - 00:02
Agro
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Looks like GA with a charging circuit.
The charging circuit adds a lot of resistance, but nevertheless this battery looks very interesting.

Thanks HKJ!

Agro
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Last seen: 5 hours 9 min ago
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I wonder how does it compare to Fenix ARB-L18-3500U…