XT60 and XT30 caps with battery percentage

XT60 and XT30 caps  with battery percentage. have you ever flown a battery and put it in your bag but now it lays with the other batteries. there are caps that show 0- 50- and 100% so you know what batteries are used there is also one where it says fpv. 

this cap can be printed in TPU, PET-G and PLA. these are the filaments i have printed them in, so others might work too