Petit Crouton with Boost Regulation?

[Rhyen Skytracker]

When we get the CC drivers back in stock if all goes well they will be a 3A driver.

thanks Tim.

[hybridspecies]

Awesome news about the 3A drivers - that's definitiely a game changer in favor of a series/parallel approach for these leds, as was Sunrider's driver. My LZ4 is amber so it only needs about 12V forward to make 1.5A which I can do with four 14500s in shotgun formation and still fit in a standard hilt with speaker, sound card, and other electronics. Not sure how to fit more than one 18650 without extensions or other modifications, but I have to agree that a series approach isn't going to work either if a 20V pack is required. Just curious Sunrider, when you run the Praxis upwards of 6 amps, how much voltage sag are you getting from the 18650s? Did your voltage ever dip below driver or sound card thresholds when using fully charged cells? IMRs wouldn't have a problem, but I'm curious how regular cobalt li-ions did since alot of them list around 5 Amps as maximum drain. Thanks so much for your time and recommendations in these posts. I value your expertise and appreciate the information so generously given. Many thanks.

[Sunrider]

The 4 pack can be done, but no soundboards will handle that voltage. The components I use only need 5v to function so no problem there. Some batteries sag bad when you push them near their current limits. I use NCR 18650s. They are much better under load. 2 can do 10 or 12 amps at 4v continuously. They have much higher capacity than anything else also. They are tricky to fit but necessary for my high power setups.

[hybridspecies]

Thanks for the info. I wasn't sure if the h6flex would still work at 5V under high load since the webpage sort of indicates a minimum input of 7 volts. Also, I'm going to have to look into those NCR cells for a flashlight mod I've been tinkering with. I was under the impression that NCR/NNP gave you greater capacity at the expense of discharge rate, but 10A in a higher capacity 18650 is no compromise. Are you using Pany branded or AW or Redilast? I haven't wired a soundboard yet, but I was thinking about tapping half of the four 14500 pack to power a PC at 7.4V. I think this would be the simplest approach so long as I can isolate grounds. Have any expereince or thoughts/cautions doing this?

[Sunrider]

Tapping into a pack like that is dangerous don't do it. I would try to run a soundboard off a regulator if I had to, but here we go again with heating problems from the voltage difference. The NCR batteries are better in all respects to others. The AW and others that use the NCR18650s are protected. I use the plain Panasonics with tabs so I can make a proper pack with the proper voltage PCB.