Time to replace the OEM battery on my 2010 Escort. I realize that if I disconnect the battery, all the on-board computers, PCM, radio, etc will loose their memory.
So, can I keep power flowing by connecting a charger to the battery cables behind the terminals? Then I can (carefully!) remove the terminals from the battery while the charger maintains power to the electronics…
I also have an easy way to run a 12v float charger into the auto accessory socket so I don’t have to actually clip onto the battery cables themselves.
–> Will this work, or do I risk blowing up the electronics since the charger output may not be the even current from an actual battery?
I’ve also heard that hooking up a 9v transistor radio battery up to the accessory socket will preserve the settings.
–> Will a tiny 9v battery maintain the settings for an hour while I run off to the store?