i have 2 bad 6v batteries,have 2 rebuilt coming.can i use a 12v deep cycle with the 4 6v as a short term fix,no heavy use,just in and out of garage.would two 12v in parallel work better? would the 36v charger work with this.
Yes and the run time. You could damage the 6 volt batt. that are still good that you have in it, by over charging them by trying to charge the odd ball pack.
