There were questions how much charge can be lost when parked.
I did a test. When I left for 12 days vacation I took a picture of the charge.
Upon return I found that it lost... 0% of the charge.
Please see pictures.
I would vote to stick it for future use.
Car was parked in the garage. Temp outside was between 60 F (night) to 85 (day). Inside would be say 5 below max and 5 above min...