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 Post subject: Re: Anyone replaced their 12V Battery yet?
PostPosted: Thu Nov 08, 2018 9:40 pm 
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Joined: Fri Jan 23, 2015 1:18 pm
Posts: 391
I have found that 12V battery life is very strongly influenced by heat. On my old BMW 328iS and Volvo V70 with batteries in the trunk, the batteries lasted at 7 or more years, while all my cars with batteries in the engine compartment usually only lasted 3 years. If you live in a very hot place, then the battery will die fast - otherwise, I think you might be able to get a lot more than 3 years out of a battery in an "engine" compartment with no heat.

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 Post subject: Re: Anyone replaced their 12V Battery yet?
PostPosted: Fri Nov 09, 2018 12:15 pm 
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Joined: Mon Jun 13, 2016 8:14 am
Posts: 75
2016golfse wrote:

Sorry for not seeing your post earlier. Yes, coding a new battery is required, although you don't have to take it to a dealer if you have the right tools. It's thoroughly covered here:

http://forum.obdeleven.com/thread/2041/ ... eplacement


Thanks for that - I've been on the fence about picking up an obdeleven, but I'm definitely going to get one now!


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 Post subject: Re: Anyone replaced their 12V Battery yet?
PostPosted: Fri Nov 09, 2018 12:17 pm 
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Joined: Sat Dec 16, 2017 6:29 pm
Posts: 37
ckdavis wrote:
Thank you for sharing your story. Sounds like it is a good idea to just get the battery replaced around three years or 30,000 miles of use, in order to avoid issues with having the car act up when the battery goes bad.


You should buy the battery /charging monitor, the one plug in cigarette . Only about $10. ( Don't waste money to buy the expensive).
Att.: Choose the one not only measure the battery voltage but one can also monitor the charging.
When you see the battery voltage always 12V, that the battery dead. On that case if you don't replace the battery, then the battery down to below 12 V ( totally dead ), the car will not run anymore.
The in car charger will charge 12V battery when we plug in to charge the HV running battery, and when the car runs on road, the charger may also charge the 12V battery if needing.
With the battery/charge monitor, you will know when the time you need to replace the 12V battery, and some time you also know if in the case battery is good but the 12V charger in car is bad.
Tip: If battery dead, you could replace the full charged battery ( temporary battery) and drive to dealer or home, then replace new & coding it.


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 Post subject: Re: Anyone replaced their 12V Battery yet?
PostPosted: Mon Dec 10, 2018 7:55 pm 
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Joined: Thu Aug 09, 2018 6:33 am
Posts: 11
Is new coding needed if you just replace the battery without issues?


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 Post subject: Re: Anyone replaced their 12V Battery yet?
PostPosted: Tue Dec 11, 2018 5:19 pm 
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Joined: Mon Oct 05, 2015 2:01 pm
Posts: 2184
cyb593 wrote:
Is new coding needed if you just replace the battery without issues?


Some people plug a 12v battery into the cigarette lighter outlet, or power outlet, and then change the battery carefully under the hood. That too will prevent needing a reset.

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