mode selection via 2nd button or switch?

[Lightbringer]

@teus

thanks for the quick answers!
my budget is around 20 USD, maybe 30 maximum.
ideally, I would want a sliding switch or ring to select the mode. not a second button.

Ultrafire DV-S9 diving light?

Just got one, beautiful little light, wondering if anyone has one and “dived” (haha) into it yet. Takes a 26650, or 18650 with the included tube, has a switchless tailcap that covers 3 O-rings. Everything else seems to be put in through the front lens side, ’though I haven’t opened that up yet. Tempted not to (and risk ruining any seals). There’s a magnetic switch, a little captive slider with magnet, no opening, slot, nothing. Inside looks like a Hall-effect sensor that reads relatively-speak…