I’ve been a flashlight nut for a LONG time. I remember when 18650 powered lights were rare. I remember when Surefire actively tried to stop people from using rechargeable cells in their lights.
I find it absolutely amazing what you can get these days when it comes to flashlights. BudgetLightForum.com is an amazing place because they’ve pushed manufacturers to make really nice lights for not a whole lot of money.
I recently picked up a pair of Sofirn SP33 to give to the inlaws when they asked for some “nice” lights. This thing is big enough to be comfortable to hold while making a ton of light and not overheating or anything. It runs on a 26650 rechargable lithium cell. It’ll do 2500lumens on turbo and 1000lumens for several hours on high. It also has a ~1 lumen “moonlight” mode which will probably run for weeks.
At the other end of the spectrum, we have the Emisar D4 which is TINY. It’s less than 4" long and an inch in diameter and it’ll do 3300lumens on turbo. Sure, it’ll get really hot doing it and the thermal regulator will throttle back pretty quickly, but it is just bonkers how much light this tiny thing produces. As such, it runs on high drain capable 18650 cells like the Panasonic/Sanyo NCR18650GA. I EDC the D4 with the tail cap unscrewed a bit to keep it from burning a hole in my pants if the button on it is accidentally depressed.
My wife has a few battery powered radios that she uses all the time so I picked up the MiBoxer C8 which is a nice intelligent charger that can do anything from a AAA to the newest 21700 and 26650 cells.
As you can probably guess, I don’t even look at AA or AAA powered lights and a light needs to produce at least 1000 lumens to even attract my attention. Generally, you can’t get enough power out of AAs or AAAs for any meaningful amount of time to drive these LEDs at 1000lumens.
Oh and that light linked to in the OP, well, the LED in it is only really rated for 800lumens. I’ve seen ads for it claiming as much as 3000 which is just silly and completely impossible on 3 AAAs.