Hello shephardc4,
in regard charging battery: use 5W charger and charge it during the night.
I'm used to do it with all my last smarphone and I can assure you the battery will last long.
Fast charging is something that customers asked for, as well as the bigger screen, that is no necessarily useful.
Except for standard 5V 1A charger I would not risk battery using even a 5V 2A because there could be differencies in frequences output that can damage battery.
In regard battery percentage: it's more or less correct in principle, specially for what concern the lower level - something I've heard from people that works in this field - should be better to charge you phone at 20% (10% is too low) and stop it at 90% (there is a dedicated menu in ZF about this).
It is also not recommended to keep the phone plugged to charger after 100% but, again, basing on my personal experience, I didn't got any issue due to keeping smartphone plugged in after it reached 100% of charge, especially if we're used to do it during the night...probably it's related to fast chargers, not standard ones (5V1A) and I do not see any problem in general because batteries nowadays have got microchips that turn off energy once reached the maximum charge.
It's probably something to say, from manufacturers legal point of view, to keep out any responsibility.
