OK, my OEM battery from December 2002 still functions and is currently on a maintainer for the winter but I feel I am pushing my luck.

When she comes out of storage and I contemplate a battery change, is there any merit to hooking up the maintainer or another small battery to maintain power to the ECU while I do the replacement? Or do I need to worry about it?

I'm concerned about the 'relearn' process.

Haven't found this particular issue mentioned in the 3+ pages of posts related to batteries.

 

You've never replaced a battery before? Just plug and play.

 

probably a few more than you have, but many have issues with the ecu relearning or throwing codes after components are replaced or changed.

I'm interested in anyone that may have kept 12v in the system while they did it.

 

No. The ECU is pretty smart. Install a new battery. THe ECU will be back to normal in a day or two.

 

Trying to keep your high score from resetting?

 

Just replace Batt. If you needed to keep your radio presets we used to use a 9volt battery to hold memory but for the ECU there is no need.

 

There are battery packs you can plug into the ciggarette lighter to do what you are asking.. Personally it's not worth the effort as it'll relearn within a day or two. I've personally had my negative cable disconnected at least 100 times.

 

Oh, Man. I think I just laughed until I sharted!!

 

Maybe the OP has had a bad experience with changing the battery another vehicle. For example, if you don't use a voltage maintainer on my Silverado, the radio quits working correctly because of the anti-theft feature.

 

Seriously??!! Dude, stuff like that drives me nuts. Who do they think they are benefiting?
"Oh, you opened the passenger door and flicked the high beams at the same time as releasing the hood? For your security, we've disconnected your starter solenoid and it'll require a factory reset. Thank you for choosing ____________ ."