I use 14 cell GP3300s and 3700s. The run times vary depending on run style of course. I've had run times as short as 8 minutes bashing hard and probably about 20 (got lost in the moment) just curb crawling etc. I can get actuals in a couple days if you want. I haven't run 16 cells because I'd have to get a new charger which isn't doable for the moment.