Thanks for all the info guys,
Jarndice, I can't speak for the current Mato offerings but the tank that was supplied to me was what I was told is an older unit, and the electronics were utter garbage. They didn't work OOB and the tank was a paperweight

Erik, The battery age is not an issue as the one that I'm using is brand new out of the packaging. They are 5000mAH

Cirus, I don't agree about charging in the tank. After I'm done rebuilding / detailing these models opening them up regularly becomes an issue, as this leads to inevitable parts breaking / paint getting scratched. On an early tiger this is even more so due to the fifel system. On my builds I like to do everything from the outside and only would need to open the model up for emergency maintenance.