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Old 12-16-2016, 08:19 PM
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Default Saving Settings While Changing Automotive Battery

Tomorrow I will be replacing the battery in my wife's 2013 KIA Optima. I can save over $70.00 by buying and installing the battery myself instead of tossing money at the stealership.

The parts guy at the KIA dealership told me that unless I properly changed the battery, I could loose most if not all of the settings which could cause problems anywhere from the radio locking out to engine calibrations being deleted.

I found that there are devices called battery memory savers that you plug into a power (lighter) port or USB connector. If all these things do is provide a temporary source of power to keep the settings, I am wondering why I could not use an old spare lawn tractor battery that is 12 volt, and connect it to the cars battery cables before I disconnect them. Am I missing something here. Will connecting another battery to the car battery for a few moments until I remove the cables fry anything?

I realize that I will have to devise a method so the jumper battery connections do not come off while I am putzing around removing the cables from the car battery. If one would happen to come off all my effort would be for nothing.

If this will work, any tips or techniques on securing the jumper battery cables to the car battery cables would be appreciated. Since I just need to keep a 12 volt supply to the system, I was thinking about using some 14 gauge stranded copper wire for the jumper cables with some sort of strong alligator type clamps..........thanks.
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Old 12-16-2016, 08:23 PM
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Supposedly a 9v battery is good enough, but I've no experience and suggest further research.

https://www.walmart.com/ip/Performan...&wl13=&veh=sem

Note that they are not recommended during repairs, especially welding on a vehicle: http://www.searchautoparts.com/abrn/...perts?page=0,1
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Old 12-16-2016, 08:46 PM
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So how does the memory keeper work when the power to the cigarette lighter is shut off with the ignition on a lot of new cars?

I would get one that interfaces with the obd2 port. Looks like pin 4 and 16 are the ones you want to put the leads from your battery to.
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Old 12-16-2016, 09:05 PM
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It's going to vary by vehicle and how they are wired. The Obd-2 port is a good call/idea. But, sort of complicated. It boils down to one simple question ? Do you have a cigarette lighter(probably no longer PC to ask) or a power port that is live with the ignition off. If the answer is yes you can feed power into your system to save settings fairly easily. Sort of plug and play.
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Old 12-16-2016, 09:29 PM
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I'd just use the spare battery, secure the jumpers and do the swap. Just go slow so you don't bump the jumpers.

Last batteries I got for the Dodge, the automotive dept. installed them for free.
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Old 12-16-2016, 11:24 PM
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Quote:
Originally Posted by Whitetrash View Post
It's going to vary by vehicle and how they are wired. The Obd-2 port is a good call/idea. But, sort of complicated. It boils down to one simple question ? Do you have a cigarette lighter(probably no longer PC to ask) or a power port that is live with the ignition off. If the answer is yes you can feed power into your system to save settings fairly easily. Sort of plug and play.
If I look hard enough, I have a gizmo that plugs into the power port and had a 9V battery which saves the settings. For the few minutes it takes to swap the battery out, I doubt you'll have any problems with the ECM losing its brains. Now, on my 2000 Z71, I don't lose the clock or radio settings if the battery is disconnected for a few minutes. Maybe your KIA is blessed with the same feature. Take a look at your owner's manual before you get too far with this project.
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Old 12-17-2016, 01:04 AM
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Quote:
Originally Posted by Pat View Post
...I was thinking about using some 14 gauge stranded copper wire for the jumper cables with some sort of strong alligator type clamps..........thanks.
You could create some jumpers that should work. Most auto parts stores and even Wal Mart have a bigger spring clamp that should spread wide enough to go over the battery terminal. A 1/2 wide or so, about the size they put on a battery charger. But...

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...For the few minutes it takes to swap the battery out, I doubt you'll have any problems with the ECM losing its brains...Take a look at your owner's manual before you get too far with this project.
What Monkey said ^^^ You shouldn't have any issues for the few minutes the battery is out. Probably lose radio and clock settings. And even IF the engine computer loses its "settings", most cars will "relearn" how to act within a few miles. But DO read the owner's manual--it will probably tell you precautions to take while changing the battery.

PS: I bought a battery for my GLI a few months ago and that was about $150 with trade in. And this was AFTER the service manager gave me a coupon to use. Nice battery though, Diehard AGM. Other places weren't any cheaper, either. The days of a new $40-$50 battery are over, I'm afraid but $70 sounds good...
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Last edited by mccutter; 12-17-2016 at 01:10 AM.
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Old 12-17-2016, 09:39 AM
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Radio has a backup battery. You may lose learned engine parameters, but it will relearn them. If yourorried use a jump pack.
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Old 12-19-2016, 04:10 PM
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Thanks for all the information and suggestions. I ended up making a set of mini jumper cables out of some 14 gauge stranded copper wire and alligator clamps made by Deka for chargers and other low voltage applications. I then attached them to the correct battery cable. Everything went fine. I was worried about loosing settings, but the only thing I lost was my good Snap-On 1/4" drive 10mm socket. I figure by now it is somewhere between home and where my wife works. I spent over an hour looking for that thing after I accidently knocked it down along the engine somewhere. I was hoping that when I backed the car out it wood be on the floor somewhere.........nope.

Thanks again.
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Old 12-19-2016, 07:34 PM
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Quote:
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I was worried about loosing settings, but the only thing I lost was my good Snap-On 1/4" drive 10mm socket.
Even with a $15 replacement cost you are still ahead of the game
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