Originally Posted by morgoth

I have the 2018 5200mah model for my mbx8eco and I'm very pleased with them. I have about 20% left in them after a 12min main without warm up rounds and charged to 4.325V per cell so it's on the edge. 10min mains are no problem.
The 6000mah model would be the safest bet, but it's a little heavier.*

My buggy weighs a little under 3500g with the 5200mah batteries.