i need to get some supplies, as tomorrow is the last day of our work week....and i want to do as much of the wiring as i can till Saturday....so...
some brain storming...
i want the 2 batteries to charge once the engine is running, but i also want the main battery to be switched off once the engine is off. im thinking...relay....linked to the acc switch....when it has no power (ACC off) the secondary battery is working, once its ON, both batteries are working and hence charging as well..
problem is...i need to get the EXACT same battery so they dont drain each other out...but i want to install a dry cell as my primary, because these liquid ones have sooooo much maintenance.
any ideas how to do that.??? before u reply...image you are in the woods and can only strip something out of a stereo or something to do this... yes we do have supplies here.....but very limited.