T1/T2 battery pair dead (these were the original top batteries from each pair, the ones with the lower voltages after first use). Able to get an occasional vape, but at least 50% of the time when I push the button red goes out, no blue, no firing. Just over 3 ml consumed, under half what the Infinity would do, I'll meter them when I get home. Basically 50% of Infinity. I'll switch to B1/B2 when I get home, meter them fresh. (That's what the no fire is, batts getting ready to die. I'm certain I'm pushing the power button now. I'm also not chain vaping by any means, about a 5 second draw, maybe two, every so many minutes.)
Science, I say, science!
(I'm an early adopter, and an engineer by trade, so kicking the tires tests is normal for me. My Infinity, after one round of TLC, has been a stunning device, and I'm certain the Buzz Pro will be a notch up

)
As a comparison, all 3 pairs of Infinity batteries run full day; each pair has had about 50 days' use/recharge cycles. I'm a 5.5 - 6 ml/day vaper, very consistent in my use patterns, stick to a single liquid the vast majority of the time, and 3 - 3.4 ohm cartos; I adjust the voltage down slightly when it's a 3 ohm -- I seek consistent power/warmth/vapor automatically. On several long days I've run through 7 ml on the Infinity, still without them quitting. I believe I've had 3 days in 5 months where I managed to need to switch to a second pair of batteries, they were all in the > 7 ml category IIRC (couple days when I switched to lower mg and did a lot of vaping).
I'll probably be a good candidate for VVPV, given my tendency to stay on one liquid all day, consumption level -- oh, no, being pulled into the Buzz zone...