Earlier quoted context omitted.
Why do you want your phone charge to last more than a day? Can't you just charge it while you sleep?
Sleeping in the middle of nowhere to enjoy some stargazing perhaps? Stuck in an airport overnight? Long term local power outage? There are nice things about long lasting batteries.
To anyone who complains that they won't be happy until the perfect device exists that meets all their needs and nothing they don't and doesn't need adapters or dongles to do it: I still use serial cables at least once a month. Do you hear me complaining that I can't find a laptop that includes a serial port? No. Because I recognize that my need is niche and adapters exist to fulfill that need. It doesn't need to be baked into a mass-market device. I'm an adult and can solve my own problems with readily-available tools.