Testing conducted by Apple August through October 2024 using preproduction 14-inch MacBook Pro systems with Apple M4, 10-core CPU, 10-core GPU, 24GB of RAM, and 1TB SSD. Wireless web battery life tested by browsing 25 popular websites while connected to Wi-Fi. Video streaming battery life tested with 1080p content in Safari while connected to Wi-Fi. Display brightness set to 8 clicks from the bottom and keyboard backlight was off. Battery life varies by use and configuration. See apple.com/batteries for more information.
THere’s also Wi-Fi strength, other apps (e.g., it does appear you had VSCode open at least at some point), etc.
Looking further over your screenshot, “Time on battery” is 11:14 and estimated runtime remaining is 3:24. And, unless I’m mistaken, that would imply ~14 hours of runtime (not 6) with Safari being the vast majority of usage.
…. I didn’t realize @Apple_Robert already pointed this out.
What is the screen brightness set to? Time on battery shows 11hrs. If the time shown is accurate, that means the Mac will get 14hrs of battery usage which, is not unreasonable.
What is the screen brightness set to? Time on battery shows 11hrs. If the time shown is accurate, that means the Mac will get 14hrs of battery usage which, is not unreasonable.