I've had the S22U since launch day (Feb 22 here in Canada anyway), and the battery life is an easy 2 days, very similar if not slightly better than the S21U I replaced. Overnight I lose 2-3%. The phone needs time to learn what apps you do/don't use as well, so give it a couple of days if it's brand new. My typical usage is very much on the productivity side (hundreds of texts/group chat messages, calls, internet browsing, reddit, news, emails, photos, music, podcasts, etc.). No games, minimal video recording, and minimal YT/Netflix. I end a typical day with 65% battery left which is really excellent in my opinion (charged to 100% just to test). I am using the phone in the highest screen resolution mode, auto brightness, WiFi and BT on all the time.
I also do the following:
- Dark mode (I prefer it anyway, and OLED screens use zero power to display black pixels. White colors use the most power)
- Limit background refreshing AND data usage in the individual settings for each app that I wish to restrict (basically all social media and anything else that likes to constantly wake the phone and do things in the background)
- Let the phone put unused apps in a deep sleep
- I do not use the always-on display
Also, treat your battery well:
- Never let it get to zero charge or remain at a very low charge, especially for long periods of time, and especially not if it's really cold
- Never let your battery get exposed to very hot or very cold temperatures. If you go outside in the winter for example, keep it in an insulated pocket or a pocket near you body heat.
- Try not to leave it charging overnight unless you have "battery protection" enabled in the settings which treats 85% as maximum charge - the longer your battery stays at 100%, the more it harms long term capacity
- The best thing you can do for your battery is keep it between roughly 40-60%, charging frequently via wireless charger or whatever is convenient for you rather than 5%-100% sweeps every day or two. That isn't always convenient, but do what you can if it's easy for you.
- Use slower charging methods when convenient (faster charging = more heat = faster battery degradation.) Even if you use a fast charger for maximum speed, the phone will not charge at 45W the entire time regardless, for this exact reason.
If you replace your phone annually, the above doesn't really matter too much, but if you keep your phone for 3-5 years, you can have a huge impact on how long that battery lasts you if you are willing to put in a tiny bit of effort. These rules apply to most Lithium batteries in most consumer goods like drones, power tools, phones, etc.
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