Since we're talking about batteries, I will say I am very pleased with the battery life I'm getting from the IPV4 in TC mode.
I've been doing a massive re-organisation of my office and all my vaping stuff, which had got a bit out of control. So for the last 24 hours I've been using the same tank and the same build on the IPV4, rather than having lots on the go as I usually do. This allowed me to do a test of battery life.
- Yesterday at 10:00 I put in a fully charged, two-week-old pair of Samsung 25Rs
- I vaped exclusively on the IPV4 and my Lemo 2
- 0.15 single coil build, 405°F, 40J
- I got Weak Battery today at 18:00.
- So that's 32 real hours
- Which I would estimate to be 22 vaping hours.
I chain vape heavily, 10-15ml a day, so anything more than 24 hours from a dual battery mod is very good going for me. With my VF clone I have been getting as little as 15 vaping hours - though that's not directly comparable as they would not have been exclusively TC vapes.
Anyway, I'm definitely pleased with the battery life with constant TC usage. And if there's any reduction in battery life from series versus parallel, I can't see it (but quite possibly there isn't when I'm vaping at <4.2V ?)