This is a battery door I whipped up today to hold a 2 cell, 2500mAh 18650 battery I pack I made. The battery is similar to the Strix Power Stix from RMRC. You can use that one if you don't feel like making your own.
Print in the orientation shown in the pictures. If you're using PLA and you're confident in your bridging settings, then print this without supports. After printing, cut off the little pieces circled in red with an exacto and you're all set.
The part in the pictures is the first version I printed up to check the dimensions before I fancified all the edges.
EDIT V1.2: After multiple prints I found a few areas that needed improvement. I increased the footprint for the modeled supports to prevent failures. The back of the door was too tight in its slot and would crack. Finally, some cosmetic fixes were applied.
X9D_18650_Battery_Door.stl | 267.9KB | |
X9D_18650_Battery_Door_V1.2.stl | 270.6KB |