Is a .2 voltage drop overnight normal for 2018 civic?

[sdegg]

I have a 2018 Civic. Just had the battery replaced at the dealer 3 months ago. I measured my battery voltage yesterday around noon, and it was 11.77 volts. This afternoon, it measured 11.55 volts, and I had to jump-start my car. Is a 0.2 voltage drop overnight normal?

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[gtman]

I'm not trying to give you crap but why ask here? You shouldn't be seeing voltage in the 11's with a new battery.

I mean, you just bought a battery from a dealer 3 months ago and it already conked out. You should be at the dealership right now having them take care of it. Honda batteries purchased from a dealer have a long warranty.

100 month Honda battery warrany

• For the first 36 months of your warranty, our Honda service center will replace your Honda battery, covering the battery, labor, and installation at no cost to you.
• For the remaining 64 months, you’ll receive a credit to cover part of the cost of replacement.

 

[longthaitran91]

Why was the voltage below 12v to begin with? Do you have any high powered amp installed to your car?

 

[sdegg]

I'm not trying to give you crap but why ask here? You shouldn't be seeing voltage in the 11's with a new battery.

I mean, you just bought a battery from a dealer 3 months ago and it already conked out. You should be at the dealership right now having them take care of it. Honda batteries purchased from a dealer have a long warranty.

Went to two different dealers, they say my battery is totally fine and I just need to drive more. Also went to O'Reilly and they didn't find any problems with the battery. My last long-distance drive, about 4 hours, was 2 weeks ago. Since then, I have been taking 1~2 mile short trips here or there. Could that be the problem?

 

[Romeoridgee]

.2v is not a lot overnight, but a normal battery would sit at around 12.4v (75%) and a full battery would be 12.7v (100%)

 

[Zelk77]

I had a similar issue with my Accord. With a new battery it would not start after 3-4 days sitting. The voltage would be at 11 volts. I took it into the shop and they said that it wasn't being driven enough. I've had cars that sat for a few weeks start with no problem. Finally the starter died and wouldn't turn over. It was replaced and I haven't had it happen again.

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