Del Tran make the "Battery Tender" Plus, Junior, Weatherproof for boats and etc. You can easily hard wire the leads to your battery and just plug in the unit. It will always keep it charged to the proper level than go to "float" mode. You can either hard wire or use aligator clips. I have three special interest cars all on Battery Tenders. You can just unplug the quick disconnect and you are ready to drive away. Don't skimp on a cheap unit. You get what you pay for. The Del Tran models cost about $35-$60 dollars depending on model and place of purchase.