AA Battery Holder NiMH 7.2V for RC Car

Make your own 7.2V NiMH battery pack for RC cars. You'll need:

-6x 1.2V NiMH AA batteries
-Some exposed wire for battery contacts (THICKER THAN IN PHOTO)
-Thicker wire for lead wires 
-RC battery connector

Size suitable for 1/10 RC Touring Cars (Tamiya TT01/02, Kyosho etc) due to the tall 3x2 arrangement. Fit is not the best but it works.

Instructions: PETG recommend but PLA should work (for PLA, be more careful when soldering as melt temp is lower). Connect contacts as per photo with spare exposed wire wrapped around the hole a few times. Remember to insulate after wrapping. Batteries MUST be inserted in indicated direction. Use whatever connector you need (Tamiya/Dean's T…). Recommended to remove cells and charge individually for more balanced charging.

Tested with IKEA LADDA NiMH 2450mAh batteries with Kyosho Fazer Mk2 but any other AA sized NiMH should work, just don't expect high current delivery like COTS NiMH packs. Do NOT use 1.5V Alkaline batteries as your ESC may not support such high voltages. Only use 1.5V batteries if you know what you are doing and your ESC and motor supports 3S LiPo voltages. Not recommended for racing as the cells may shift during operation and disconnect. Did not encounter this myself but use at your own risk. I will not be held responsible for any damage caused.

Update: After having tested for some time, I find that the thickness of copper wire I used and amount of winding was insufficient. This generated sufficient heat to melt the PETG case slightly. Thicker copper wire properly twisted together to avoid high current on single strands should suffice.

Remixed from https://www.thingiverse.com/thing:2339441