Disconnect battery when parked?

I’ve been thinking of a battery disconnect for my Scamp, primarily for when I rarely drive it during the winter.

What battery disconnects are you using? When I read reviews on some, half of them indicated they were crap (ie: broke or didn’t fit). Post up yours if yours so I can get a good one!
Caterpillar had a disconnect switch that used a key. Any Cat Skinner would have a key but the average person would not. Designed for 24V and diesel starter current. Can probably get a good used one from and equipement wrecker.