Battery Selection Question

[Cardnyl]

When deciding to purchase any given battery using the testing threads produced by HKJ is the idea to basically pair a battery with a curve suited to the LED in your flashlight?

For instance, if I'm getting ready to buy a light that uses a CREE XP-L HD V6 for the LED and I know that I'm only interested in performance related to the strobe/turbo functions is the right method for picking out a battery to pull a spec sheet from CREE for the LED and marry that to a performance curve in one of the battery testing threads?

-or-

Does the actual selection process require additional measurements to be taken of the light itself using a DMM.

I apologize if this has been covered, I tried a few searches but I couldn't find what I was looking for.

 

[wicky998]

I think the way you've described is a pretty solid way to make a battery choice .

A lot of guys don't even do that .

 

[ChrisGarrett]

I match the cell to the device's current drain/demands.

Chris

 

[Cardnyl]

I think the way you've described is a pretty solid way to make a battery choice .

A lot of guys don't even do that .

I think i found the spec sheet (https://www.cree.com/led-components/media/documents/ds-XPL.pdf ) - it lists a "forward current" value of 3000ma. The flashlight manufacturer recommends a 4A+ discharge capable 14500 cell. Is the flashlight mfg. padding their requirements to encourage the use of a quality battery to avoid "unknowns" (e.g. ambient temperature) or is the "forward current" listed on the spec sheet unrelated to what I asked in the original post?

Sorry - bit new to this. Want to make sure I'm doing this correctly since this is my first foray into high lumen lights and lithium cells.

Thanks

 

[jayflash]

Greetings Cardnyl. Although a given LED may be specd for a certain average & maximum current, the actual current drawn from the battery depends on the particular flashlight. One flashlight brand may use a driver who's maximum current is higher or lower than a different brand, even when using the same LED. I've been trying to purchase cells that have C rates higher than my lights maximum drain current.

 

[Cardnyl]

Much appreciated. Thank you all for the feedback :twothumbs