When the phone is not set to suspend, and mostly idle with a couple of apps running, and some occasional web browsing, its about 4 hours. Under similar conditions using suspend (meaning it will keep the modem powered and wake up the rest of the device wen receiving phone calls and SMS) then I can get through a 9 hour workday and have about 40% battery left.
I have been daily driving the phone for a couple of years so I’m sure the battery has degraded some, but I don’t know how much difference I would get with a new one. It can be easily replaced, so I may do that in the future.
You get to pick. 90 seconds, 90 minutes, 90 hours, 90 days, 90 weeks, 90 months, 90 years, 90 rotations around the Milky Way Galaxy, 90 cycles of the Big Crunch/Big Bang, 90 iterations of God, 90 iterations of whatever made God, etc…