I have an "alternate philosophy". Granted, batteries are expensive but I've concluded that in the grand scheme of things, they're actually the cheapest part of the vaping equation. I just use them within their design parameters and vape for maximum enjoyment, rather than maximum battery longevity. I mean, that's what vaping is for me after all, enjoyment.
I've learned to plan my vaping investments so I don't need to worry; all my equipment is regulated, and I never (well...rarely) exceed 35 watts or build lower than .5 ohms. I don't adhere to those limits for the sake of equipment longevity, and I don't need to since my equipment can perform far beyond them. Those ranges are just my own personal "happy zone". I don't consider them self-impositions...I mean, I already have enough restrictions in my life, thanks! I also have a drawer full of "restrictive" vaping gear that performs below my happy zone. I'd say it's worthless, but no; part of the learning process, part of the overall investment.
Point is, if I wake up one morning and decide I want to bump it up to 50 watts, I can and will. Not going to worry about the battery and don't have to...the equipment will do its job and cut me off if I go buck wild.
If you want to go to 4.7, go. If you're at the point where you're really concerned about pushing the limits of your equipment, it might be time to upgrade. If and when you do that, consider your investments wisely. Cheaper at the moment isn't necessarily cheaper in the long run. Believe me, I have the drawer full of obsolete gear to back that up. Whatever you buy, just make sure it keeps you in your happy zone with room to grow. Better to be satisfied than to be counting battery discharge cycles, no?