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Member
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Join Date: Mar 2022
Location: Kentucky
Posts: 552
Real Name: Rich
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Member
Join Date: Mar 2022
Location: Kentucky
Posts: 552
Real Name: Rich
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There are parasitic drains on car batteries; radios, ECUs, etc. If you let them sit the battery will eventually run down. In addition, I read here that the JBL radio amplifier also has a problem running down a battery.
If you don't have experience with batteries then you really shouldn't mess with them. Car batteries can be very dangerous. If you've had the battery for only a few weeks and it's dead you should return it to the store and get another one. Start the car daily for a while and check the voltage, both running and stopped, daily to monitor for any drains. When charged up it should read 12.7 volts DC. Take the car to Advance Auto or other parts store and ask them to test the alternator, battery, etc. They usually do that type of work at no charge.
The battery you should have in there should be lead-acid. This could be a standard lead-acid or it could be an AGM battery. You shouldn't have a LiFePo4 battery; Lithion Ion. That's the type that you were describing in your post. If they get drained low enough you have to put another battery in parallel with them to raise the voltage. (Positive to positive, negative to negative)
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Rich
2004 V8 4Runner 140K+ miles
Kentucky
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