Shockli 21700 4550mAh (Purple) 2018

Official specifications:
  • Nominal voltage: 3.7V
  • Nomimal capacity: 4550mAh
  • Maximum continuous current: 22A

High capacity and high current in the new 21700 format from Shockli.

The two batteries are matching very fine and can handle up to 20A. They cannot deliver full capacity to 2.8V, but maybe to a lower voltage.

The batteries gets fairly warm at 20A

And I had to stop at 30A


The batteries has lot of capacity and can deliver fairly high current, it looks like good batteries.

Notes and links

The battery was supplied by 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