Regarding life of the fixed battery...
If the estimate of full recharges - typically 300 or so - is close, and you recharge it three times a week, that's still about 2 years.
By then, the latest and greatest will have sensors on the drip tip to analyze the vapor and fine tune the experience for us, and you'd need to upgrade anyway![]()
That's probably as wrong as when the claim was Li-ion would last 5 years from their manufacture no matter how you charged (or even if you charged) and it was OK to keep them topped up. All my year old eGos have dropped off drastically. Figure they got charged about every other day after the first month. So after about half that 300 you're going to be charging twice as often and the last half will go faster.
It may not matter with a boost but you'll probably get tired of dealing with a battery that drops to 50% almost instantly long before it officially dies from use.
A 2600mah at 50% may be more tolerable than 1000mah at 50%, but if that 2600mah was an 18650 it wouldn't be an issue.
I'm just not a fan of the planned obsolescence with expensive products and batteries that aren't supposed to be changed.
I want a camera and ring tones for my eVic.