How Long Does The Foil Drive Slim Battery Last?

In this video I go out in some small Lake Michigan waves to see how long two foil drive slim performance batteries last.
Setup:
Amos Shapes Sultan Wing - 5'5 75L
Lift 32" mast
Lift 220 HAX
25 High Aspect Tail
Foil Drive Slim with performance battery

[@pkphohog]

Today I rode a slingshot 999, 1125sq., slim performance, 38 ltr., 4 foot 6, on flat water for 16 minutes, missed 4 or 5 pop ups, I weigh 160. Battery checker says 20%

[@hunterlukes]

Interesting so you were just efoiling around or did you have a mix of pumping in there?