In this video, I share my solution for getting my large 5000mah batteries to fit in the battery tray on the Thunder Tiger Raptor E550FBL. There are two tabs up front that prevent a larger battery from fitting all the way forward (which appears to be required for optimum CG). I removed one of the tabs that were in the way and then reinforced that side frame area with a small piece of aluminum from a ruler. I think it worked well. So far, I see no need to remove the other tab, but if it’s necessary to fit the battery, it’s easy to do to the other side as well.
I have seen where folks have just removed the tabs without further reinforcing the side frame. I decided to take the extra step with the aluminum, but I suppose if you wanted to just cut the tab, things may be okay.
The battery I am using is a Turnigy Nano-Tech 6S 5000 mah.
Dimensions are 48mm x 50mm.