So I got more than just 4 litres of storage when buying the framebag. Extra security for the battery included
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Not really super tight but maybe it helps. The conical shape of the down tube is not ideal when using velcro straps but the bag doesn’t slip.
Just as an FYI, stupid me, not digesting the completeness of this particular thread....I went and purchased the 6L BAG, IT'S TOO BIG, it doesn't fit in the "triangle", but it does hold a spare battery. Unfortunately, because it is too long at the front, it cannot be relied upon as a secure means to carry a spare battery.
So.....I got the 4L bag, as pictured, again the opening is too small to allow the insertion of the Vado battery (just like the top-tube). The 6L has the same size zipper, but because of the extra length, you can put it in nose 1st and it fits.
The point here is I was of the belief that this thread/posting was to do with carrying a battery, not keeping the battery from falling off the frame.
So, the next project is a 6" PVC or Black ABS pipe with caps mounted to the Racktime rack to carry a spare battery.
Although Brendon shows a bag "that is meant to carry a battery", it is way too big of a bag for me.
For those days I just want to experiment with Blevo or Mission Control I want to be able to have a reserve in case I run out of juice on the initial battery, I don't want to be stuck peddling a 50lb bike + my 230 lb. body a bunch of miles.
I saw a posting somewhere on this forum but cannot find it....someone did use a PVC pipe on the Racktime rack, but I was unsure if it was 4" or 6"....as the battery can only fit into a 6" pipe.
Oh, fun.