Large Battery Holder for Mr. Baddeley's R2-D2

thingiverse

Inspired by Eebel's battery carrier for Mr. Baddeley's 3D printed R2-D2 body, this is a battery holder designed specifically to fit two Duracell Ultra 12V 20AH Deep Cycle AGM SLA Batteries with NB Terminals (Model Number WKDC12-20NB): https://www.batteriesplus.com/productdetails/wkdc12=20nb The bottom of the holder features a custom design that fits perfectly over the splines of the center foot support, securing it in place using four M4 bolts. Additionally, there are loop holes on each side of the holder for two 2" wide Velcro straps to secure the batteries tightly. I deliberately omitted a handle from the battery holder as it would be too cumbersome to lift out of the droid without disassembling the slip ring mount and dome drive gear. My intention is to leave the holder in place within the droid and remove the batteries individually for maintenance. A significant update was implemented on July 22, 2018, which included cutouts for the center foot screws (8mm around and 5mm tall) in the bottom of the battery box. Important Note: The weight of the batteries may exert considerable stress on the center foot support. The extent of this stress will depend on the material used for printing (I exclusively use ABS). To mitigate this issue, I am considering modifying the support to make it thicker, and I plan to store my batteries separately from the droid.