I really hope they will come out with something soon, as you mention at least jump on the train with 4ah and 8ah LIHD battery, I mean what is the reason to have bigger gap between the battery on the new 36volt tools, at least on the latest tool I have. Today I have 2 2ah and 4 4ah battery and two dual charger, so sure that works, but don't want to buy 6ah if a newer version is around the corner.