To be safe and not damage the cars electronics, disconnect the battery Pos. and Neg. Hook the charger to it and put it on the 12 amp setting. Do this when you are going to be home all day so you can monitor the charging progress.
You don't want to over charge the battery and boil it dry, as I have done in the past.
When the charger shows a full charge reconnect the battery and you should be good to go.
Batteries are tougher than you think. My Duralast is 5 years old and goes
dead on me at least once a year because I rarely drive the car. Well, last
week I didn't get my door completely closed. Guess what, no interior lights, no dash lights, no nothing. Nada, zilch, nothing, completely dead.
I disconnected the battery and charged it on the 12 amp setting for 8 hours.
It was about 3/4 charged so I took the car out for the evening. That was
Saturday. Sunday I put the charger on it and it registered a full charge.
I checked it again tonight and still a full charge.
Hope this helps.
