Nitro Nectora / Inductrix battery cap

Here is a set of caps for Inductrix style lipos, in my case [nitro nectars](https://newbeedrone.com/products/newbeedrone-nitro-nectar-210-mah-battery) from https://newbeedrone.com.

There are two models with different letters on top. One comes with an **F** for **f**ull and the other with an **E** for **e**mpty. You could also print them in different colors, but I had only transparent filament and therefore went over the letters with a permanent marker.
I printed mine out of [filaflex](http://recreus.com/en/4filaflex-filaments), which is basically TPE.