What is your overall favorite flashlight for each of these battery types:

[brachypelma44]

Single 14500:
Single 18650:
Single 21700:
Single 26650:
Multiple-cell (any battery type):

 

[brachypelma44]

Wow. Over 24 hours later, there are 40 views and no responses. Are people shy or just confused?

I guess I'll go first, then.

Single 14500: Acebeam Rider RX SS
Single 18650: TBD - have my first two on the way.
Single 21700: Acebeam E70 SS (FC40 4500K version)
Single 26650: Don't own any yet, but I'm looking. The D4SV2 looks nice, and the Convoy M3-C does too.
Multiple-cell (any battery type): Sofirn SP36 (5000K version)

Please feel free to bust on my choices, and more importantly, share your own.

 

[3_gun]

Single 14500: Fenix LD12(2017)
Single 18650: Sofirn SC31 Pro
Single 21700: Acebeam E70 AL
Single 26650: NA
Multiple-cell (any battery type): Custom 1k/L incan MagLite (9 AA)
CR123a (any) Streamlight TL-3

 

[Olumin]

zebra SC5c II
Malkoff MD2 M61W
-
-
2x18650: Malkoff neutral hound dog

I had hoped to have turned that last one to a 2x21700 by last christmas. How times flies.

 

[Hooked on Fenix]

Single 14500: Acebeam H40 headlight
Single 18650: Nitecore HC60 v.2 headlight
Single 21700: Nitecore E4K (followed closely by Nitecore MH10 v.2)
Single 26650: don't own one
Multiple cell (any battery type): Nitecore Tiny Monster TM06s

 

[flashflood]

Single 21700, multi-emitter: Acebeam EC65, V54 modded to 4 x 519a
Single 21700, single-emitter: Thrunite T2, V54 modded to GT-FC40

 

[AB8XL]

Single RCR123: Sparklight SG3 NW XM-L2 T6 bin
Single 14500: EagleTac D25A Clicky - Nichia 219 B10
Single 16650: 4Sevens Quark QK16L MKIII
Single 18650: Zebralight SC64c LE
Single 21700: Zebralight SC700d XHP70.2
Single 26650: Emisar D4SV2 LH351D 4000K
Multi 18650: EagleTac MX25L3C Nichia 219 B11

 

[NutSAK]

Single 14500: 4Sevens Quark QTA Tactical
Single 18650: Malkoff MD2/M61n
Single 21700: N/A
Single 26650: 4Sevens Maelstrom MXS "Standby"
Multiple-cell (any battery type): Malkoff MD3/M91bn (2x18500)

 

[Trout River]

Single 14500:
Single 18650:
Single 21700:
Single 26650:
Multiple-cell (any battery type):

Don't own any 14500, or 26650 lights.

Single 18650, MD2 M61 or M61N

Single 21700, I only own one 21700 cell light, so... Olight Seeker 3 Pro.

Multiple cell Hound Dog Super in 4000K or 6500K for throw, Malkoff Wildcat for flood.

 

[xxo]

Single 14500:
Single 18650:
Single 21700:
Single 26650:

I can run all of those in a Mag ML300 with 3D printed adapters, plus D, C, AA, AAA and CR123/16340 cells.

 

[Caveman4455]

Single 14500: Lumintop GTA
Single 18650: Nitecore MH11
Single 21700: dont have one
Single 26650: 2 C-cell Maglite with 3v 10w halogen bulb and brass spacer
Multi-cell: Nitecore MH40GTR, 2 D-cell Maglite on 6 AA NiMH with Carley 612 bulb

 

[vicv]

I'm not much of a flashaholic I guess
14500: none
18650. Solarforce lp2 with 3.7v "15" w xenon
21700: zilch
26650: nada
Multi cell: now this is tough. I'll narrow it down to two. Big and small.
Big: Mag 3C with 2x21700 cells and tads 7218 pr bulb with kaidomain smooth alu reflector and glass lens
Small: surefire a2 aviator with red leds and stock ma-02

 

[bykfixer]

16340: PK Design Lab PR-1

 

[Trout River]

I can run all of those in a Mag ML300 with 3D printed adapters, plus D, C, AA, AAA and CR123/16340 cells.

Oh man. If you think that way.
Stay away from Malkoff. Lol

 

[jon_slider]

The Jetbeam RRT-01 Raptor Stepless Rotary can use:

AAA rechargeable NiMh, or single use primary
AA rechargeable NiMh, or single use primary
cr123a single use primary
and the following LiIon sizes:
14500
16340
18350
18500
18650

 

[RWT1405]

Single 14500:
Single 18650:
Single 21700:
Single 26650:
Multiple-cell (any battery type):

I'm apparently not a "Flashaholic"......................

14500 - I have no (zero) 14500 cells

18650 - Malkoff MD2

21700 - I have no (zero) 21700 cells

26650 - I have no (zero) 26650 cells

Multiple-cell - SureFire, Streamlight, Malkoff, MagLite, etc., etc., etc.

 

[Ken Lee Photography]

I don't believe I have quite the collection of flashlights that you guys have. But the ones I have are quite interesting since I use them for light painting of subjects at night (night photography)!!

Single 18650:
- RGB Critter 2.0 (this is designed for flow art/performance, but I have been using it for light painting of subjects and it's working quite well so far, and the quality of the light is fantastic. This has 39 different colors. Charges via USB

- Wurkkos FC11 LED flashlight (this is a relatively "normal" flashlight, produces a warm white LED light, has brightness ramping, is waterproof, and is only $30. And yes, this too is great for light painting of subjects at night!

Double 18650:
- ProtoMachines LED2 (this is designed for light painting subjects and is utterly fantastic. The quality of the light is superb, and it gives you full control over huge and saturation across the RGB spectrum.

 

[3_gun]

Single 14500: Fenix LD12(2017) Update: Wurkkos TS10
Single 18650: Sofirn SC31 Pro Update: Emisar D4v2
Single 21700: Acebeam E70 AL
Single 26650: NA Emisar D4S
Multiple-cell (any battery type): Custom 1k/L incan MagLite (9 AA)
CR123a (any) Streamlight TL-3 Update: HDS Executive

 

[zs&tas]

The Jetbeam RRT-01 Raptor Stepless Rotary can use:

AAA rechargeable NiMh, or single use primary
AA rechargeable NiMh, or single use primary
cr123a single use primary
and the following LiIon sizes:
14500
16340
18350
18500
18650

That's so dope ! 🤣🤣

I've had many lights but slimmed down alot.
My fav .
18650: thrunite scorpion
26650: 4sevens mmu X3
21700: olight warrior x 3
My choosen multicell is a klarus g30 with mt G2 goodness.

 

[Jean-Luc Descarte]

14500: Lumintop Tool AA v2.0

It just punches so far above its weight that when I had it and wasn't expecting to need long runtimes, I pocketed it. Don't have it anymore but it was an awesome little light. Hope its new owner is putting it to good use too.

18650: Convoy S2+

LED, collimator, anodising color... set it up however you want, Bob's your uncle either way. Mechanical tail switch, too, in such a compact package that I sometimes forget I'm carrying it. The lowest 0.1%/0.3% (don't remember which) mode could stand to go a touch dimmer, but that's a personal picked nit.

21700: Convoy M21B

This thing is BEEFY. It's got the same head design as the Convoy M1, but the head/body size ratio is a lot more reasonable. The amount and depth of the head fins allows for good cooling without sacrificing portability, which is perfect for the FC40 emitter I run on it. The whole package is set just right to extract as much performance out of the 21700 cell as it can. And with the standard 12-group firmware, it feels familiar right out of the box. This is my favourite flashlight so far, and I'd tote it a lot more if my need for personal lighting wasn't so meager, especially now in the summer when we get the sunrise at 4AM. 😒

That said, a caveat emptor: with my setup, the beam has a very pronounced "fried egg" effect where the spill and corona are white but there's a faint donut hole in the middle that's considerably warmer in tint, almost yellowish. It's inevitable when you put a big LED in a small-ish reflector. Doesn't bother me in the slightest since it doesn't affect CRI to my eyes, but some people are anal about their beams. In this case, pick a smaller emitter like the Nichia 519A.

26650: N/A

Don't own any, so no personal experience. I wanted to, until 21700 came out with its better energy density and more compact size, and I went with it. I'm keeping a look out for how 26800 develops instead; if it becomes more than a wildcat battery, I'll go for it.