Battery charger vs power converter

[kayco53]

I know there is a difference between a power converter and a battery charger but what is it.Some of the new smart chargers look pretty capable.In my old school truck camper all there is are a few led lights.
Uses very little power and very seldom plug in.

[Vulcan_Rider]

What exactly are you thinking about doing ?

Sometimes you can use a "dumb" battery charger to provide 12 V, but without a battery connected too the power wouldn't be very stable.....or clean.