2019 terrain denali... We are not using the car much this time of year and I know there's a fair amount of parasitic drain on the battery with it just sitting in the garage.. I'd like to put my smart charger on the battery to top it off but wonder if this is safe to do .. I know there are diodes and circuits that could be damaged if everything is left connected and a high rate of charge is used so I was thinking about charging at just 1 amp ... Would this be o.k. or should I charge at half an amp?.. It's a three stage charger that will automatically go from bulk charging to constant voltage and decreasing amperage phase followed by a float charge.. I can adjust the amps /volts and figured I'd use 13.5 volts as peak voltage ... I could disconnect the battery cables but then I'd lose presets etc. etc.