It's a battery holder that can only use the manufacturer's atty -- and that atty is usually some kind of RBA /Genny. The bottom of the atty connects directly to the top of the battery with no connector -- not just no 510 connector.
To me it's a mis-use of the word Hybrid. I don't see anything close to this definition from Dictionary,com:
"Anything derived from heterogeneous sources, or composed of elements of different or incongruous kinds: a hybrid of the academic and business worlds.....
heterogeneous: different in kind; unlike; incongruous. "
If someone could explain what is so new and different in kind about putting an atty together with a battery with proprietary attributes I might "get it". The name makes no sense to me.
I'm sure there is plenty of hype and even some valid data on why the so called hybrid style could be superior in function -- but really, isn't it mostly a genny that looks more streamlined?