Battery life impact with fast charging
I've seen this functionality in a Dell XPS laptop BIOS, a sort of a calendar where you can set days/times where fast or normal charging is used. Not for phones though. The closest you can get is to have two chargers - one capable of delivering maximum current and another "dumb" 100-500 mA, and use the latter one at night. I started doing this as soon as I realized that charging can't be tuned in the phone. The results are promising so far - my phone is on the same battery for 3+ years going strong, while the same age and model operated by my SO is at the end of the second one :-).