I just purchased the SP70 . I noticed the batteries rattle around quite a bit They are Sofirn batteries that came in the kit. To help quiet the rattle I wrapped them with some clear packing tape.
I am wondering if the battery tube is made a bit wide to accommodate other brands of batteries which may be a tad wider or is it just a design flaw.
And , could a second wrap be placed over the first to solve the problem ?
I get some regular paper, cut it to the length of the cell(s), wrap it around the batteries, and I get it to fit perfectly by trimming off the paper until it *just* fits in the light. If you take your time and do it just right, the batteries will settle down into the light with a nice sigh *or* they might have to be pushed in because the fit is so good that the air pressure might actually hold the battery up. Think of an engine and piston compression.
I do this with all of my lights because if there's one thing I hate and that's rattle. Makes the light feel cheap. When I can rap on the tube with a fist and hear no rattle I'm very happy!
Wellp, some people piss’n’moan about not being able to use protected cells, doublewrapped cells, etc., so the mfr listens and bores out the tube a bit bigger to accommodate those cells. And then still…
I use several torches with several battery’s. Charging/changing all the time. Some wide body some not.
I just put whatever in whichever torch and don’t rattle it around.
If yo that fussy. Keep same battery in same torch.
And wrap with something.
I use that hospital sticky paper tape for gripping on my BLF/348 torches etc.
Could do same for internals. It gives GREAT grip on externals.
I got too many battery’s floating round to have fixed dia for individual ones.
Have fun.
I too dislike the rattling of the cell. As I dedicate a battery to a particular light, add an inner sleeve of waxed construction paper, different thicknesses from packaging (as shirts). Sometimes have to shim some .020” (about 1/2 mm) total.
And when I get it just right, that satisfying feeling of the cell’s reduced speed of falling into the tube.