I assume it is more akin to 26650 in diameter, no way to fit 3 batteries inside otherside. Thus quite a bit fatter than a Convoy S2.
The link from the op doesn’t work any longer. But a quick Google suggests these are £12.99
Rationally that is more expensive than buying a Convoy S2+ but I can see there may be some appeal in modding one. It isn’t a huge amount of money. Would be nice to see what the quality is like on them in terms of machining, threads and anodising. I suspect it may feel rather cheap however.
