ok right after you quit laughing at this stupid question.....
put a new deep cycle battery in this morning, been on the "on-board charger" all day and the charge light is still on. in the event the charger has gone bad i would like to unplug the "on-board" charger from the wall outlet ----hook up the portable charger for awhile and see what happens.

the question??? if the on board charger is not hooked to an electrical outlet can i hook the portable charger (alligator clips) to the battery wihtout taking the negative and postive leads of the on board charger off the battery ----without shorting something out in the battery or the on board charger.

thanks in advance