Got my S20 Ultra on 2nd March from Carousell. Some dude pre-orderedf from a telco. Got a decent deal for a sealed set + buds @ $1.6k.
Anyway after 3 days, here's my battery report. Will monitor for the next week.
Day 1 (2 March) - 120hz, FHD, No battery saving.
Downright terrible battery. Only managed to get an average of 3hr screen on time. Standby time was draining for some weird reason
Day 2 (3 March) - Switched it up with WQHD, 60hz, no battery saving.
Decent battery life. 4.5 hours of screen on time. I don't game on my phone but I use social media a lot.
After the 2 days, day 3 seems to be a bit better
Day 3 (4 March) - Went back to 120hz
Screen on time went to 5hrs 20 mins. Which honestly is not bad. So kinda happy with it.
Day 4 (5 March) - Same setting as day 3
Similar screen on time at 5hr 30 mins.
Long story short. Same thing applies, the adaptive battery learns your usage patterns first.
From my Note 10+ experience, battery life got better after 2 weeks of constant use. So I hope the case is similar for the S20 Ultra.