It's so irritating that the Roam drains so quickly in standby mode. If you forget to switch it off (because there are no lights on in standby) and you want to use it after a few days, the battery is empty. Now you have to keep in mind that you actually charge it every night. It would be a huge improvement if the Roam turns itself off completely after being on standby for, say, 30 minutes.
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The new Battery Saver mode does exactly that. This feature was added with the latest 13.4 update:
https://support.sonos.com/s/article/5085?language=en_US
Thank you, what a coincidence. This really makes the Roam so much more user-friendly. Tested for a few days now. Only lost 4% after going into standby mode. 
great!!
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