Wanting to modify a 4AAA flashlight to run on better powersource...

[ladieu]

Hello, I have a flood light which I have mounted to my handlebars for mountain biking. Its working very well but only uses 4AAA batteries. I was thinking of busting out the solder gun and wiring this into a new battery pack, possibly D cell that I could put in the water bottle area.

Was wondering how many D cells or AA I should be using to power this light.

Is there a simple calculation or resource I could be pointed to so that I could understand this myself?

Thanks

Nick

 

[Fallingwater]

AAA, AA, C and D cells have the same voltage.
Use the same number of cells (4).

 

[Lynx_Arc]

depending on how hard the light hits on the 4AAAs you may need a resistor using AAs or C/D cells. If the light runs a lot brighter on NIMH AAAs you have that going on. I am guessing 4 cells would work as Fallingwater suggested as long as the voltage of the 4 cells was in the same range. You may also wire a 6v SLA too if it won't overdrive the light too much.

 

[Fallingwater]

If that light is LED-based it must already have resistance in place, or the LEDs would pop very quickly indeed from four cells. Therefore he shouldn't need to futz around with more resistors if he wires it to run on D cells.