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What’s an acceptable laptop battery discharge rate when it is turned off?

I have a Lenovo laptop (few months old) with Windows that is only used on weekends. It’s kept unplugged during the week; when turned on after 5 days, I notice it looses about 25% of its charge (e.g this week it went from 80% to 55%)

Is this an acceptable value? It seems a lot to me.

And that’s after doing a few things that somewhat alleviated the problem (the discharge was even greater before):

  • turned off “Hybrid Sleep” under power management
  • turned off wake-on-lan under network adapters
  • turned off “Always ON USB” in the BIOS