Onboard battery chargers

[joecowboy]

Has anyone had any experience using an "onboard battery charger"?
Do these actually use the power of the battery to operate itself and keep the battery charged? How well do they work?

[wavery]

Has anyone had any experience using an "onboard battery charger"?
Do these actually use the power of the battery to operate itself and keep the battery charged? How well do they work?

Can you supply a link to what it is that you are talking about??

Any battery charger should keep your battery charged-up while you are using it. Of course, that depends on the amount of usage and the size of the battery charger.