25 miles

If its a new battery with a good charging system 12.8 to 12.6 is what you should expect. The problem is in order to save fuel a lot of charging systems only charge your battery 80% to save fuel.

Some of the things to look for are no-starting and trouble starting, dimming lights and problems with stereo system output. If your car starts but stalls when you’re underway, your battery is probably not being recharged due to a faulty alternator.

Pep Boys

about seven years

The alternator is a key component in running the electrical systems in your car. When your alternator begins to fail it can cause a variety of different electrical problems in your car, and eventually cause a breakdown. Alternators can go bad suddenly, or slowly over time.

If you’re hearing a grinding sound in your car, this could indicate that the alternator is going bad. The grinding sound may be caused by a worn-out bearing. Your car can also make a whining sound when the voltage regulator is sending signals to the alternator to charge more than is necessary.

Alternators have moving parts, get dirty and are subject to stress from heat and cold. As a result, the internal parts gradually wear out. One of the most common failures is bearing failure. The needle bearings that allow the rotor to spin freely inside the stator can break down from dirt and heat.

Will having a subwoofer in my car kill my alternator or battery? Nope. Nobody but you will hear your tunes and your battery/electrical system will do just fine.

Yeah its fine, I usually make an effort to turn the electronics off though first. I’ve done it. You’ll be ok.

1. Step 1: Led Headlights. Gas bulb headlamps are power hogs.
2. Step 2: Led Signaling and Indicator Lighting. I used full leds for my external car indicating lights.
3. Step 3: Using Lifepo4 Battery for Engine Starting.
4. Step 4: Enjoy Longer Service Life on the Alternator.