Photos from the initial conception of the holder, through refining of the idea
to pattern making, prototyping, moulding, casting to finished item.
Also are concepts for MTE P7 torch adaptor and prototype, although due to changing
dimensions, this was decided impractical to become a fully fledged universal attachment.
After fruitlessly searching for holders for 18650 lithium ion cells, I decided to make my own.
this was initially going to be a pair of ends, with configurable tracks inside to determine the
wiring of the pack, either 4 cells in series, 4 cells in parallel, or a combination of them both,
2 pairs of series cells wired in parallel. This would be very simple to make, cast out of some
sort of resin due to the size of the end parts. A central bolt would hold the 2 ends together
to allow for any discrepancies in cell lengths.