I made this box to hold a Titan 3S brick-type LiPo battery, which is a much higher capacity than the stick-type battery that is specified in the Mosquito design. The fit is fairly close, so no guarantees that any other type of battery that isn't 3x 18650 LiPo cells will fit. Here is a link to the Titan battery for reference: https://www.evike.com/products/17770/. I have also included an STL “test fit” file that is a 10 mm slice of the battery box that you can print and use to test the fit of a battery or the box lid.
This box will also work with Shawn Nenos' extended handguard, as the 20 mm separated M3 holes are the same.
I have also included an STL of the battery shape that I designed around, for reference.
The center rail of the outside of the battery box is M-LOK spec, but I neglected to add clearance for an M-LOK nut on the inside of the case, so keep that in mind. I may fix this in a future version.
The author remixed this model.