It's better in general because it can deliver continuous power rather than power at twice the line frequency. If you're going to convert AC->DC and want a constant current to the battery, there will need to be a rather large capacitor to smooth the 100Hz or 120Hz power coming in.
It's better in general because it can deliver continuous power rather than power at twice the line frequency. If you're going to convert AC->DC and want a constant current to the battery, there will need to be a rather large capacitor to smooth the 100Hz or 120Hz power coming in.