Does anyone know......

LED Flashlights – General Info
1

Hi all,

A quick question for those who might know. I've ordered the Astrolux FT03S SBT90.2 4500lm via the BLF deal. This is the first flashlight I've encountered that somehow will manage to operate using any one of three different battery types, that is, three different batteries of different physical dimensions. I don't know how it does that but it suggests that one of those types of battery is going to fit just right and the others may be flopping around from side to side inside the flashlight. The manufacturer states that the torch will work with 1x 26650 or 1x 21700 or 1x 18650. That's great but I want the one that fits perfectly without any flopping around because of sizing issues. Can anybody say for certain which of the these batteries will offer the most snug fit (but fit without issues caused by oversizing either!), no flip-flopping around in there?

Also, what would be the highest genuinely rated in mah, protected battery that I could use?

Thanking you muchly,

Regards

Stewart

2

26650

3

With decent sleeve adapters, none of these cells should flop around much, but I agree, the 26650 should give the best fit without needing a sleeve.

4

You get the most out of a 26650 for run time and output. 21700 is the next best choice. Even though an 18650 fits, you need a high quality cell with high CDR to get the most out of it, and you lose capacity quickly with high CDR 18650 size.

5

no no, u dont want a protected battery for that kind of emitter, it draws tons of amps running protected is lika kinda useless….

6

What’s the max current draw on this light?

7

Simple trick to help prevent 18650 rattle. Get yourself some clear shrink wrap battery tubing. I’ve put a layer on several of my 18650’s and it took care of the rattling, no fitment issues at all. The clear is nice because it preserves all the battery identification (color, labeling).

8

…the muffin man? Why yes, I do. Why do you ask?

I would recommend the PLB-55 which is rewrapped under several names, most commonly the Shockli 5500mAh:

https://m.aliexpress.com/item/32976184111.html

Also available at Gearbest, Banggood, NealsGadgets, etc.

9

Hi Pete,

It seems as though a battery capable of 9A to 10A CDR is optimal (see the notes at the bottom):

Absolute Maximum Ratings
Symbol Value Unit
Maximum Current (CW)1 IF 18 A
Minimum Current (CW)2 IF 0.2 A
Maximum surge Current
(t < 10 ms, Duty cycle < 0.1) IS
27 A
Maximum reverse Current3 IR N/A A
Maximum Junction operating temperature4 Tj 150 °C
Storage Temperature range -40 to 130 °C
Operating Temperature range -40 to 85 °C
Note 1: Sustained operation at maximum current will result in shortened lifetime
Note 2: Device is designed an optimized for operation near 9 A and operation at low current may result in variable performance. Contact Luminus for
more information
Note 3: Not designed for reverse current operation
Note 4: Sustained operation at maximum operating Tj will result is shortened lifetime and may cause premature product failure

10

Yeah, but it also says max current is 18A, so you need a cell that can handle that.

Forget about using a protected cell.

11

OK. So which would be a range of preferred cells (make/model, etc) to handle that kind of CDR?

12

Post #8?