Jetbeam M1x - voltage question

[Bushman5]

on the Specs page of the Jetbeam site, it states that the M1X can go up to 18 volts (Input voltage: 6.5-18V). However since there is only two 18650 cells at 3.7 volts (7v total rough guess), could i say maybe make a longer battery tube and run FOUR of the AW 3.7v 18650 cells (15 volts total, lots of room for hot off the charger battery voltage too....)?????

i'm already getting long run times with 2 18650s, 4 of them would just be gravy. Also would it make the light even brighter?
:devil:

 

[Bushman5]

oops, this should be Flashlight Electronics - Batteries Included

DM51 can you move it? :candle:

 

[DUQ]

The answer to the question is in the specs.

"Battery: CR123*3, RCR123*3 0r CR123*4, RCR123*4, 18650 Li-ion*2"

I think they are calculating the 18v as 4.5v per Li-ion cell. Normally it's 4.2v :shrug:

 

[Bushman5]

thats still only around 8 or so volts (with two 18650 cells) ...no where near the 18 volts listed in specs.......

any chance someone with 4 of the AW 18650s can run em end to end ( + to - ) and measure the voltage? both hot of the charger and after a cool off?

 

[rolling]

thats still only around 8 or so volts (with two 18650 cells) ...no where near the 18 volts listed in specs.......

any chance someone with 4 of the AW 18650s can run em end to end ( + to - ) and measure the voltage? both hot of the charger and after a cool off?

4xRCR123 = 16.8V

 

[Bushman5]

well, now i guess i gotta find someone to machine me an extension tube to handle the 2 extra 18650's :devil: its gonna make the light the length of a 4C maglite, buts that ok, considering the extra runtime and power...

 

[Black Rose]

well, now i guess i gotta find someone to machine me an extension tube to handle the 2 extra 18650's :devil: its gonna make the light the length of a 4C maglite, buts that ok, considering the extra runtime and power...

Connecting batteries in serial increases the voltage.
Connecting batteries in parallel increases the capacity.

Running 4 18650 cells will have the same runtime as running 2 18650 cells, since you are only increasing the voltage, not the capacity.
It will likely be brighter but won't run any longer.

 

[rolling]

Connecting batteries in serial increases the voltage.
Connecting batteries in parallel increases the capacity.

Running 4 18650 cells will have the same runtime as running 2 18650 cells, since you are only increasing the voltage, not the capacity.
It will likely be brighter but won't run any longer.

Thats not right... totally not right.

8.4V*2200mah = 18.48 Wh
16.8V*2200mah = 36,96 Wh