We have no idea. But we still have strong opinions.
I think a battery's life rating of 300 cycles is that after the equivalent of 300 full charges, the run time of the battery, or in our case, the number of hits, is expected to be 80% of new.
So if I get 600 hits new, after the 300 cycles, I should get 480 hits.
Can you imagine life without Li-Ion? We would have 4 AA batteries that might last as long as the 2 650mah we use currently. Then we'd have to buy new. The voltage drop would be unacceptable from fresh after not many hits, changing the vape and flavor. And 4 D size? Fuggetabout it. Cig-a-like??? Not possible. The other option would be Ni-Cad rechargables, but they'd have the same problems ad alkalines, except you can recharge them.
The only viable option would be a "brick" like the transformer/rectifier between the AC outlet and your laptop (or flatscreen, etc.)
Thank you Li-Ion.