Has anyone modded a H1-A boost driver?

When you have PWM in the audible range, any black fabric you shine upon will make it audible.

I need a recommendation for a 18650 battery to run my H1-A. I was going to use a Sony VTC6.

I was also thinking of using a Samsung 40T, if I decide to use a 21700 battery instead.

Any thoughts, tips, insights, hints, opinions are welcomed.

Any cell capable of 10A continuous is adequate. If boosting its output driving current up to 4.5A a higher current cell may fit a bit better, but no big deal.

Cheers ^:)