I've actually been really impressed by my 8 pro battery wise. I have it set to an 80% limit, and I still charge once daily. I'm running amber, pokey & citrine in the background for Nostr, plus synching & a VPN. I still get 4+ hours of screentime, and rarely drop below 30% battery before it's time for bed.
Discussion
So far, I have been impressed with the battery life, even with running my XL display at full resolution. Coming from a 6 Pro, I can't really speak to the difference between the 8 Pro (5,050mAh) and the 9 Pro XL (5,060mAh), but it seems to be consistent with the benchmarks I've seen online. Both battery life and charging speeds are a huge upgrade.
Yeah lots of things can contribute to better life. That being said Full Rez 120Hz for life 😂 I notice 60Hz when I use the 6a now.