B7 Battery holder nut socket assembly tool
thingiverse
The B7 Battery Holder Nut Socket is an essential device to help fix the lock nut to the battery holder when it is inside the end cap of the B7 Federation Blaster. There are two versions to fit the two possible battery holders that you could fit, single cell or double cell. Belkin BXS001/1 takes one 26500 (1xC cell) to give 3.7v~4.2v and the BXS002/1 takes two 26500 cells to give 7.4v~8.4v depending on your requirements. Choose one. Obviously the end cap tube needs to be longer for the bigger battery holder, hence the two different lengths. You must use a brim or it will almost complete then fall over. Don't ask me how I know. I used 50% infill but I think pretty much anything 20% or over will be OK.
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