User level: Level 1 (7 points)Hi there! Feels like I have worse battery life on my new 18 Pro than on my 17 Pro. This is today, a week after getting it and setting it up. The syncing or whatever it’s called was done Monday or Tuesday.
Posted on Sep 27, 2026 9:31 PM
User level: Level 10 (105,996 points)Sep 27, 2026 10:45 PM in response to nobblan
You are showing 1 cellular bar on a secondary SIM for some reason. This will use significantly more power in order to make a connection to a distant tower. A closer tower will not need to use as much battery to transmit from your device. This is where I would look first for the cause of your battery draining. It has been noted here that a 1 bar signal uses as much as 10 times as much power than one showing full signal strength. It is even worse if you lose that single bar and the phone ramps up to maximum power usage in order to find any tower at all.
Battery life and phone service bars - Apple Community
For app usage you would need to scroll up to see which apps are consuming your battery and how much they are using.
Originally posted at discussions.apple.com/thread/256366283