I’ve been using Zoho for about 6 months and have no complaints. I pay about $12 a year for a couple of gigs of storage - not a huge amount, but enough for personal email as long as you delete stuff fairly regularly.
You can create up to 30 email aliases, which I use a lot. For instance, I have an email address for newsletters, a couple for generic web logins, and then some specific ones for important accounts such as banking.
It’s easy to make filters to sort email as it arrives. This is how I handle the “priority inbox” situation. Any email from my family or other important senders is all put into a single folder, and I have an email app on my phone which checks this folder and notifies me of new mail. All other mail is either moved by other filters e.g. newsletters or just left in the inbox.
AFAIK it depends on the device. I believe it’s simpler to have a battery management system which keeps the battery charged when power is attached, and then a second separate system which powers the phone from the battery. That does lead to more wear on the battery though, so the better solution is to have a power management system which monitors the battery and keeps it within a set charge range, and additionally can supply the voltage needed to run the phone. Only when power is not connected does the battery power the phone.
From a quick google though, it seems that’s only part of the picture. High-end modern phones will often require a battery present, as they use it to smooth out the power coming from the adapter, even though most of the power for the phone when the charger is attached comes from a direct power path.