Battery Voltage

[JaviXGen]

My 2019 Si won’t start and I’m just wondering if it’s probably a dead battery. My voltage reading is at 7.9-8.4V when the car is just in accessory mode and when it’s off is that the normal voltage for these when it’s in those modes?

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[zspeed]

Should be at 12.2 when on acc mode.

 

[JaviXGen]

Should be at 12.2 when on acc mode.

Thank you!

 

[saiko21]

your battery is dead. Battery should never go below 11.2V, if it's below its completely dead

 

[latole]

your battery is dead. Battery should never go below 11.2V, if it's below its completely dead

I agree !

 

[Ducota]

You probably have a dry cell, try adding distilled water and charge. happen to me on a 2018 EX-T after sitting for 9 days. Just because it says "Maintenance Free" doesn't mean YOU can't maintain it.

 

[latole]

You probably have a dry cell, try adding distilled water and charge. happen to me on a 2018 EX-T after sitting for 9 days. Just because it says "Maintenance Free" doesn't mean YOU can't maintain it.

You are right , maintenance free is a bullshit . I save few battery like this.
Battery look to be seal, cells cover could be not easy to remove.
OP have nothing to loose to try

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