My 2020 i7 Intel MBP battery drains at least 30% overnight in sleep mode on Tahoe 26.0.1. I couldn't find many threads on this topic, so I'm starting this one. Your experience, tips, tricks, and fixes are welcome.
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Battery Drain During Sleep - Intel MBP
- Thread starter pommephone
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You can try Sleep Aid to discover what processes are draining the battery overnight. Perhaps your MBP isn't sleeping as much as you think it is.
Sleep Aid - View a Mac's sleeping habits, solve issues, improve battery life, stop sniffers
Sleep Aid is designed to reveal details on how a Mac sleeps. This is useful to see what's going on, and to help troubleshoot why a Mac won't go to sleep (even with lid closed), or why it keeps waking in the middle of the night. Sleep Aid includes many Apple sleep settings, as well as some...
ohanaware.com
Use activity monitor to check how much data the corespotlightd process is writing to your disk. This was happening with my M3 Max MBP, and that was the cause.