The three AA saik springs to mind but I think it an xr-e emitter, not the brightest but has potential.
I keep the ultraok tactical in my glove box, I have a king Kong in it and the 4aaa holster loaded with lithium primaries in there too, I just check voltage on the king Kong once a month. We don’t get the extremes of temperature here in the UK that most countries do but I may pull the king Kong for the winter if it looks like a harsh one and drop another pack of primaries in the glove box as back up.
New XM-L Light,, 26650/18650/4xAAA Good Price and 57mm head ......... NOTE: The star is solid aluminium !!! :bigsmile: that’s the ultraok link, it can also apparently take two cr123’s although I’ve not personally confirmed this.