Flashlights able to accept 18650 ?

1 dead laptop battery,1 engineer with too much time -> autopsy

-> 4 x Panasonic lithium-ion cgr18650C loading in DSD-chargers...
1 waiting... 1 possibly totally dead...

Problem?


What could I use these with?

I have no flashlight that could use 18650-cells...

Vital gear F2? No chance...

Mag 3D? can't fit 2 of these parallel in...


OK... I would like to know < 100$ lights that could use these... LED or incandescent.

I sure like this one! Plus, it's now discounted.

https://www.candlepowerforums.com/threads/112127

And, if you want to do a bit of cross-reference research, here's a chart which list lights that can run on Pila rechargeables - some of which are 18550's.

http://www.flashlightreviews.com/features/pila_table.htm

Also, here is a newer light that is very popular:

http://www.seriouslights.com/catalog/product_info.php?cPath=39&products_id=91

Hope this helps,
Bill

Thanks...

Maybe I will contact Wits' end soon

I found 8 x 18650 more inside another "dead" laptop battery... Every one of them over 1V...

So...

I really need use for them

you can also try the wolfeyes flashlights! http://www.tactical-flashlights-store.com/


the 6 series can take 1 18650

the rattlesnake series can take 2 18650 !

to use the 18650 u have to buy another bulb from their shop!

U2 is the big one that takes 18650.

But li-ions aren't safe under 3.0V and over 4.7V, so if you've got old batteries that are barely over 1.0V, you should dispose of them. I'd bet they're old and expired, too. Remember you're also removing them from any larger voltage protection the battery had, so each of the cells is even more risky!

Hello Loomy,

A point of correction...

The high voltage on Li-Ion cells should be kept to 4.2 volts (or below), not 4.7 as you have mentioned. At 4.7 volts a Li-Ion cells would "rapidly vent, sometimes accompanied by flame."

Tom

OK... DSD charged these without explosions...

Voltage on every cell was low before charging... 0.5-1.5V
Cells are from laptop batteries connected to non-used laptops 1.5 years without charging.

Now they have 4.15 V and they can drive MAG3D krypton bulb easily... 0.9A

Panasonic cells... Manufacturer datasheets give 1C discharge curves for these -> 2A should be ok for them. More? Do I really want to know ?

Yeah... they had 1 slow deep self-discharge
So... few controlled runs/cell before real use? Maybe burning that MAG3D bulb for 2 hours/cell voltmeter measuring voltage...


LEDs: Vari-brite, Huntlight, Xtar...
Incans: Wolf Eyes

Or using 2 in series inside MAG with some < 2A bulb...

Testing...
under 0.9A 3.9V and slowly dropping...
20 minutes: 3.8V
40 minutes: 3.65V
60 minutes: 3.58V
80 minutes: 3.5V
100 minutes: 3.44V
120 minutes: 3.24V

OK... Stopping test for this cell... 0.8A 3.24V at end...

And I should really make better test device... Kind of burned my fingers with hot bulb