For me I let things discharge and I do not think it is a good idea to leave a device of any kind with batteries plugged it all,the time or at least what unattended. Batteries can basically explode or go on fire just google u tube on battery fires. .
I am in no way saying the hugo is anything less then a great product ,however it is not a good idea to leave it plugged in all,the time if not being used . In doing this you are engaging the charging circuit all the time and it's not the battery life I care about here .,it's that a simple malfunction and this hugo is on fire. Now it's good it is in the metal case but even your cell phone can start to burn up and thus is the same thing. I am sure it's rare like cell phones or other devices but why temp fate 24/7. So sorry to dis agree to mr watts ,but for safety reasons I feel it is nit a good idea .
Just my thoughts .
Al