The AM04 is performance equivalent to the JP40.
(with a few improvements)

The exclusive model AM04 indicates improvements in:
Thermal performance, cell to cell consistency, and shelf life

The AM## model naming pattern is the start of our new lineup of exclusive cells.

Does Ampace make the AM04 variant?
We are not disclosing the manufacturer of models in the AM## lineup at this time. We will continue to offer the JP40 for compatibility to existing packs and for testing purposes.