Test/review of Vapcell INR18650 3500mAh P1835A (Black-orange) 2020

3 posts / 0 new
Last post
HKJ
HKJ's picture
Offline
Last seen: 4 hours 20 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark
Test/review of Vapcell INR18650 3500mAh P1835A (Black-orange) 2020

Vapcell INR18650 3500mAh P1835A (Black-orange) 2020
DSC_3478
Official specifications:


  • Nominal voltage: 3.60V
  • End-of-charge voltage 4.20V
  • End-of-discharge voltage: 2.50V
  • Typical capacity: 3500mAh
  • Minimum capacity: 3350mAh
  • Internal resistance: Max 35mOhm AC 1kHz
  • Standard charge current: 1500mA CCCV 100mA cut-off
  • Quick charge: 3000mA CCCV 100mA cut-off
  • Fast discharge current: 8000mA
  • Max continuous discharge: 10A
  • USB input power: 5V 1A
  • USB CC charge current: 750mA
  • Over discharge protection: 2.5V +0.05V/-0V
  • Over charge protection: 4.25V +0V/-0.05V
  • Over current protection: 12A ~ 15A

Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-info
This is a high capacity 18650 cell with build-in USB charger.
DSC_3477
DSC_3479 DSC_3480
DSC_3481
DSC_3482
DSC_3483
DSC_3484
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-Capacity
The two cells matches very well and are best used at 7A or below.
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-Temp-10.0
My temperature sensor needs a new battery as can be seen on the B curve.
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-CapacityTimeHours
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-CapacityTime
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-Energy
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-PowerLoadTime
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-TripCurrent
Vapcell%20INR18650%203500mAh%20P1835A%20(Black-orange)%202020-Charge
Vapcell%20INR18650%203500mAh%20P1835A%20%28Black-orange%29%202020-Charge
Charging from the USB input (The battery was not fully discharge that is the reason for only 2500mAh capacity).
Discharge-Vapcell%20INR18650%203500mAh%20P1835A%20%28Black-orange%29%202020-pulse-1.0%2010%2010-IR
Conclusion
For users with only a few cells or traveling users USB charging is a very nice options.
They look like good cells in this size.
Notes and links
The batteries was supplied by Vapcell 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/

contactcr
Offline
Last seen: 2 days 1 hour ago
Joined: 05/19/2017 - 18:52
Posts: 3644
Location: US

Maybe this is implied but did you try to over discharge or overcharge them?

HKJ
HKJ's picture
Offline
Last seen: 4 hours 20 min ago
Joined: 05/24/2011 - 12:23
Posts: 7434
Location: Copenhagen, Denmark
contactcr wrote:
Maybe this is implied but did you try to over discharge or overcharge them?

No. A protection will usually work, everything is inside a single chip with an external mosfet transistor to handle the current.

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