Well I can tell you what works for me. Kinda hard to truly explain because it’s more like a “natural oneness” now and I feel as though I’m just doing “what feels right,” as opposed to using a “technique.” Whatever the case, it happens to lead to light battery usage, it seems.
It’s all about timing, timing, timing (and additional timing). And a light touch on the trigger will sure go a long way as well. And of course, extra frosty herbs sure do help…
This is my manner of usage when using ground material.
I do almost zero preheat. The moment before I know the heater is going to begin glowing, I put the FF to my soft, pillowy lips because I know the heater will be ready for me by the time I start inhaling.
With ground material, my hit is pretty slow at first to let the heater get/stay caught up, then faster as it reaches full operational heat, and then I maintain this speed if early on in the bowl, or slow down a bit as the bowl progresses. This all happens very quickly.
I don’t ever lean on the button for the full 30 seconds until near the end of the bowl. Mine are more like 10 or 12 seconds overall, including the pseudo-warmup. IME, there is a significant couple/few seconds of residual heat after you release the button that can help you continue your hit, and should be put to advantage.
If near the end of the bowl, I do wait longer before I start inhaling, and I will also break from inhaling for a couple seconds, then inhale again, then break, etc., for a full 30 seconds. Using this method at the end, my ABV gets to about as dark as I’d want it to – to push it any further would mean I’d probably want some water to hit through, so that’s when I dump it out and save it to hit through the HI, these days. I'm a convection-only sort of guy now.
With a FF battery, every second of usage really counts. Something to keep in mind.
I think the real key here is controlling the level/speed of inhalation so that you don’t have to lean on the battery as much. I’ve said it before and I stand by it now – that when you’re learning, or training for better battery life, exhale next to a spotlight if you can. It really helped me get a better idea in the beginning of how much vapor I was actually creating as opposed to just depending on natural light or basic overhead lights.
I always end up with quite even ABV. As even as say using my HI. I usually stir it once, if using ground material.
The FF is really just a wonderful vape that syncs up perfectly with my style of usage. We were made for each other. Well, it was made for me, anyway.
And, when it comes down to it, I just don’t take nearly as many hits as the other regular posters here, it seems. Best not to forget that. I’m a total lightweight. Use about 0.25g per day, often less, never more. And I’m medicated all day, from the moment I wake up to the moment I stumble drunkenly to bed.
When away from home and using the FF, I usually vape only three bowls worth, with battery to spare.
If I have forgotten anything or you’d like some clarification, let me know. I’m pretty blitzed right now. I’ll probably add to it tomorrow.
And don't forget that it seems just about all FF users use theirs a bit differently...