Lifespan of our
batteries is not measured in time, but in charge/recharge cycles. ... In a nutshell, they will last at least 300 cycles ...
Spot on. A cell will simply not hold the same charge after 300 charging cycles, but it will continue to function.
The bottom line here, is that users need to choose a battery that fits their needs (Imagine that!). If you recharge your battery 6 times per day, you really could use a bigger battery, because it will start to fade after two months.
I'm not a heavy vaper, and I rotate through 2 900 mAh batteries. I recharge them both once every day, or every other day. At this rate, I don't anticipate having to replace them for over a year.
There's really nothing wrong with charging a battery 6 times per day, if the size fits your needs, but it certainly won't be long until you have to replace it.