My Z1 definitely has a boost driver. It can be driven with an AA cell although it obviously doesn't fit. I suspect the Z2 has the same driver and will handle both types of battery.
I was actually thinking of getting another z1 after selling mine , it was missed and is very useful,this z2 after some thought would be cool being it already has a magnet tail and it’s double more lumens versus a q5 , I ordered one ,will let u know if it does arrive ,lol they aren’t the fastest shippers in town ,lol
I wonder why there are no other Z2 reviews, it does seems to be cheaper at the expense of limited mode selection and thus limited battery life choices? The visual appearance is rather simple as well, not as sleek as H2 IMO.
Still, for 16$ I wish someone here bought it and gave thorough review with beamshots, battery life and build quality. And you can remove the head making it flood light, not bad for versatility.