Nice find but I already have some thin nickel plated brass sticks.
my question was about the marks on positive driver pad caused by battery pole
I wanted fix it with a small solder blow from an alloy that does not form oxide and more hard than SN/PB.
you could sweat solder a small piece of sheet silver on there instead, it`s a better material than gold (or anything else) even it`s oxide conducts as well! it`s also a soft metal. I replace all sorts of flashlight parts with pure silver, it`s worth getting some in (for everyone into repair and modding).
Did LED (rngwn) and resistor mod today. I only had 0805 to hand but managed to squeeze them on. Tried stacking it on top of existing 220 but didn’t work for some reason, so ended up removing it as djozz suggested (loading it up with solder and launching it) and was easier than expected. These things are so tiny. Was (pleasantly) surprised 0805 fitted. Currently have 2300K with 331, 681 and 222 resistors to see which is best for a night stand. At first guess though, I’d say 331 is around 0.6 lumens, 681 around 0.5 lumens, 222 around 0.2 lumens.
I tried with diffuser but was still too bright. Intended use is as a night light for kids (0.5 lumens should be perfect), and for me when I need to go pee pee in the middle of night (I find 0.3 lumens too bright in these instances). I bought a few (too many!) so will leave some stock for general around the house use.