duncanfan7
Posts: 2
Joined: Mon Nov 16, 2020 9:44 am

Previous owner installed lead acid 12V battery. Should I be worried?

Mon Nov 16, 2020 10:03 am

So the 12V battery died on my 2014 Spark EV (had it for about 1.5 yrs), and I noticed that the previous owner installed a regular lead acid battery in it. I'm replacing it with an AGM battery now, but should I be worried about long term damage from the old battery?

SparkE
Posts: 418
Joined: Tue Sep 06, 2016 1:18 am
Location: SF Bay Area (San Jose, CA)

Re: Previous owner installed lead acid 12V battery. Should I be worried?

Mon Nov 16, 2020 4:16 pm

duncanfan7 wrote:
Mon Nov 16, 2020 10:03 am
So the 12V battery died on my 2014 Spark EV (had it for about 1.5 yrs), and I noticed that the previous owner installed a regular lead acid battery in it. I'm replacing it with an AGM battery now, but should I be worried about long term damage from the old battery?
No, don't worry. Output from both is about 12.6V completely full, down to about 12.3V (usable without damaging the battery). And both charge back up at *about* the same rate (if you buy a 12V battery charger, you should make sure it is AGM-smart, however).

The "flooded" ( = classic) lead-acid (compared to the AGM lead-acid) simply won't last as long as the AGM. Search this forum for " 12V " and you will read a bunch of stuff recommending getting a smart trickle charger for your 12V that you use once or thrice a month overnight to make sure your 12V isn't drained too low.


NORTON
Posts: 1341
Joined: Fri May 01, 2015 5:52 am
Location: KC,MO

Re: Previous owner installed lead acid 12V battery. Should I be worried?

Sat Nov 21, 2020 10:07 am

Yeah, the 'Floating Voltage' difference is minimal.
I've run mine on a mid-size motorcycle battery for a month once.
This battery doesn't really do much work in these cars.
It's big enough to keep the key fob and cell phone receivers powered up while the car is parked for weeks.
'14 2LT w/ DCFC. 85k miles. '17 Bolt Premier w/It All. 53k miles.
GM needs Modern Troubleshooting tools for Modern EV's.
3 step Trouble Tree, 1st try, nope, 2nd try / cost $800. 3rd try fixed it.

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