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

[size=+3]Ampsplus 21700 5000mAh (Black) 2020[/size]



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

A protected high capacity 21700 LiIon cell.










The two cells match nicely, capacity drops when drawing higher current.





I forgot the temperature sensor on the A cell.











The protection circuit trips at a fairly high current, but it did break my 20A discharges.







[size=+3]Conclusion[/size]

It is a good protected cell for currents below 10A (Preferable a couple of amps below) with lots of capacity.



[size=+3]Notes and links[/size]

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