R10: Battery Draining net when not in use

[Kes]

I recently purchased a Canon R10 Mirrorless DSLR camera.  It managed to repeatedly drain the battery in just a few  days despite being turned off. The retailer from whom I bought the camera, were exceedingly helpful. They gave me a new battery and later a new camera body when the problem persisted.  When that failed they supported me in exchanging the camera for a different model - an R50.  This happened again in just 5 days.  I fully charged the battery, took 2 photos and it's been off otherwise.  On the fifth day the battery was flat.  In all, I've had 3 bodies (2 x R10 and 1 x R50) and 4 batteries in under two months, yet the problem persists.  Any thoughts?  Any similar issues for others?

[shadowsports]

I don't typically leave a battery in my camera for more than 2 or 3 days.  However, I have on occasion left one in a week without any drop in battery percentage.  We'll look forward to hearing back from you in a few days.  🙂

[Kes]

OK - update time!  I left the battery in the camera with no lens or adapter attached and it retained full charge for seven days!  Today I fired off 103 shots on burst to see if it affected the battery.  All good!  Stage two of my experiment is to leave the camera with just the adapter attached.  If that drains the battery I'll know what to do next!

Thanks for everyone's suggestions/feedback so far!