battery at 11.9 bad

[dflw_99 10+ year member]

my red-top battery is about 11.9 volts before i crank my truck in the mornings. is that bad?? its been cold so would that have anything to do with it??

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[iceteebone 5,000+ posts]

so when the engine is off the battery reads 11.9 with a dmm? iirc it should be at 12 volts with engine off

 

[waggs 10+ year member]

12.6v is a fully charged batt. anything below 12.45v is basically a bad batt. and needs to be replaced.

 

[audiolife 5,000+ posts]

12.6v is a fully charged batt. anything below 12.45v is basically a bad batt. and needs to be replaced.

can be 13v-12.3 but it shouldnt ever rest below 12 if its taking a charge. my kinetik 1400 rests at 12.9 to 13v car off

 

[luvinthebass 5,000+ posts]

mine rests at 12.5 and with engine on 13.8 or 13.9 usualy with all accessories off

 

[skadude016 5,000+ posts]

my yellowtop with the car off sits at 12.8-13volts. car on 14.1-14.2