[Ryland]

I agree to a point, if you are driving a lot of short trips or shutting your engine off and coasting a lot then a trickle charger is a great idea because your battery needs an absorption charge to stay healthy otherwise it's voltage is always going to be low and the alternator is always going to be working extra to try to top it off but to fully charge and equalize it needs a longer slow charge.
About this time of year when I'm driving more and using my head lights more I'll top my battery off with a 2amp charge over night once every month or so, I thought my battery was on it's last legs 3 years ago but it's still healthy! saving $70 on not replacing the battery has been worth it.