Test/review of Ampsplus 21700 5000mAh (Black) 2020

1 post / 0 new
HKJ
HKJ's picture
Offline
Last seen: 5 hours 12 min ago
Joined: 05/24/2011 - 12:23
Posts: 7451
Location: Copenhagen, Denmark
Test/review of Ampsplus 21700 5000mAh (Black) 2020

Ampsplus 21700 5000mAh (Black) 2020
DSC_2001
Official specifications:


  • Battery Size: 21.20mm x 74.40mm
  • Nominal Voltage: 3.60V
  • Nominal Capacity: 5000mAh
  • Rated Capacity: 4950mAh
  • Charging Method: CC/CV 4.20V
  • Discharge Voltage: 2.50V (Average Cut Off)
  • Operating Temperature: -20 ° to 60 °C
  • Standard Charging Current CC: 2450mA
  • Rapid Charging Current: up to 4900mA Max. ( Not for cycle life )
  • Continuous Discharge Current: 10A
  • Battery rate: 2C
  • Max. pulse discharge current: 14.7A
  • Measured Energy: 17.6Wh
  • Cycle Life: Capacity 3802mAh after 500 cycles (80% of the rated Discharge Capacity RT)
  • Weight: 72gr. max
  • Colour: Black, Silver, Purple
  • Protection Circuit Board / PCB: Yes, Protected
  • Version: Button Top
  • Type: Rechargeable, INR, High Drain

Ampsplus%2021700%205000mAh%20(Black)%202020-info
A protected high capacity 21700 LiIon cell.
DSC_1999 DSC_2000
DSC_2002 DSC_2003
DSC_2004
DSC_2005
Ampsplus%2021700%205000mAh%20(Black)%202020-Capacity
The two cells match nicely, capacity drops when drawing higher current.
Ampsplus%2021700%205000mAh%20(Black)%202020-Temp-10.0
Ampsplus%2021700%205000mAh%20(Black)%202020-Temp-15.0
I forgot the temperature sensor on the A cell.
Ampsplus%2021700%205000mAh%20(Black)%202020-CapacityTimeHours
Ampsplus%2021700%205000mAh%20(Black)%202020-CapacityTime
Ampsplus%2021700%205000mAh%20(Black)%202020-Energy
Ampsplus%2021700%205000mAh%20(Black)%202020-PowerLoadTime
Ampsplus%2021700%205000mAh%20(Black)%202020-TripCurrent
The protection circuit trips at a fairly high current, but it did break my 20A discharges.
Ampsplus%2021700%205000mAh%20(Black)%202020-Charge
Discharge-Ampsplus%2021700%205000mAh%20%28Black%29%202020-pulse-1.0%2010%2010-IR
Conclusion
It is a good protected cell for currents below 10A (Preferable a couple of amps below) with lots of capacity.
Notes and links
The batteries was supplied by Ampsplus 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/