You all will have to forgive me. Sometimes my brain just doesn't want to function.....it can be so frustrating!!!!!!!! I want to mount a jack for charging the battery on Gizmo. I think I would need to put some diodes (to control voltage direction only into the battery) between the jack and the battery terminals??????????? My main battery is a 12 volt, 9ah SLA what diodes would I need ? The band on the end indicates which way voltage flows, right? Any help would be appreciated.