I use these on the end of a discharged battery so I know which ones to charge when I get home. Red seemed to be the appropriate colour for that considering I don't want to accidentally plug in a discharged battery. A friend preferred green to put on a fully charged battery and that accomplishes the same goal.
No rafts... no support and printed with PLA .   It makes an extremely tight fit so they don't fall off.

I print about a dozen at a time and give them to friends at the flying field.

Print Settings

Printer Brand:

Prusa

Printer: 

I3 MK3S

Rafts:

Doesn't Matter

Supports: 

No

Filament:

Generic PLA Red

Category: R/C Vehicles