Right.....I'm in a dithering mess at the minute...the tesla isn't lasting all day, and my subox mini 18650 batteries x2 are a bit shit. My new battery died already, after about a month.
Currently, I'm taking both to work, and alternating charging every couple of hours
My tesla stealth is still holding up, but not lasting all day anymore......the 0.1 ohm coil would do that?
I'm out of 0.4's....