For those who are interested, I tested charge time and battery capacity last time I charged my Epix. Seems to have a 300mAh battery, and full charge takes 1 hour 44 minutes.
Most of the charge was done at 0.30A +/-. But after 80% charge slowed down to 0.17A, and after 90% to 0.02A.
This is same charge speed as the Fenix 6 and Fenix 7 generation, so no fast charge this time around.