List flashlights that can run at higher voltage safely

Have 4Sevens which can run alkaline or Li-ion, safe over this voltage range and specs show even higher range.
Wouldn't it be nice to have a list of flashlights that can do this (documented or undocumented feature).
Already tried this with off-brand cheapies, didn't blow up but got hot fast, so intermittent use only. Welders have % duty cycles, so these could be a subcategory.

Wow!!! I mean just wow! Almost two years membership and this is your first post.

Jash said:

Wow!!! I mean just wow! Almost two years membership and this is your first post.

Click to expand...

At this pace, he'll be able to send PMs by 2017!

Unenlightened is not looking to dazzle. Soliciting your experiences, freely shared. Saw beginning of specs spreadsheet; column of interest is 'voltage range', right now mostly blank.

Enough play time with RRRR. Please contribute to thread.

Bill

Most of the Peak pocket lights can handle a lithium ion (4.2v).

Malkoff 60/61 seriers can handle 9v.
My old solarforce mpp-1 can handle 16V.

Interesting that you mentioned duty cycle... this could be integrated with the specs. Obviously, the Quark line has 100% duty cycle with Li-Ions.

My DuravisionPro XLT-1300 is designed for 2x CR123A cells. I've run it without problem with 2x 16340 lithium-ion cells.
I run my Fenix PD30 with 2x 16340 LiFePO4 cells. (Protected cells won't fit, so I haven't tried them.)

Ive run the SureFire U2 (Seoul P4 version) using 2x16340 Li-ion, which is a much greater Vbatt than the manufacturer's spec of 2x123A Li primaries (6V nominal). Similarly, I've run a Blackhawk Gladius using 2x16340 Li-ion, also greatly exceeding the 2x123A Li primary spec.

In checking one of my Gladius XP-G2 mod projects, it looks like the driver uses a TPS64200 step down controller. It is rated at an absolute max of 7V. Not sure why 2x16340 LiCo Li-ions didn't instantly fry the driver (and I continue to use my XM-L mod'ed Gladius successfully with 2xAW16340 cells), but I'd say that 3.6V/3.2V LiFePO4 Li-ions like the SF LFP123A cells should work in the Gladius with little risk of overvoltage (just let the cells rest a bit after removing from the charger).

you mean flashlights Using AA batteries only right ?

I think there're plenty of buck-driven lights designed for 6v that will also run 1 or 2 Li-ions giving an effective range of 3-8.4v.

However, on the low-end of 0.9-4.2v, lights with both buck and boost drivers designed to fully support (meaning retain all lower modes at spec, and within warranty) from alkalines to 1xLi-ion, are really quite rare. The Quark low voltage line, some Zebralights (eg, SC80 and 52), and IV magnetic ring lights from SWM and JB. There are many more with just boost drivers that can "safely" run higher voltage Li-ions, and are even spec'd for 4.2v (w/ warranty), but will still go direct drive meaning loss of (or bumped up) lower modes.

Love to hear about any other efficient lights that full support 0.9-4.2v because I like having lots of battery options.