How do you know when you need a new battery?

[RPheezy]

Hey Guys, how do you know when you need a new battery? My battery charge meter on the instrument cluster shows 30%-40% above the negative (-) sign. In the past, it would show in the middle of the positive and negative sign.

When did you guys replace your battery?

 

[Trckmagik]

I know when my Explorer wont start

Just kidding, I would take your battery to a local Auto Zone or something similar and have them test it for you.

 

[Bill Kemp]

They can also test your alt. output at the same time.

 

['96explorereddiebauer]

Isn't the batter meter on the instrument cluster just an idiot light?

Anyways...when my battery is low, my headlights seem to be dim and it takes just a little while longer to start. Take your truck to Autozone or Advance Auto and let them check your battery. The test is free so there're no risks.

 

[EliteConcept]

run your truck for a while, then get a volt meter and check the battery voltage. If its around 11 your battery is probably shot. also a possiblity your alternator is dead...i'd have autozone check that for ya

 

[Crankcase]

Use a hydrometer....if your battery has removable caps...then buy a chapie hydrometer. If it is a seled battery, it will have a green eye in the top.....the green eye tells you if it is still good..

 

[BLUZ]

Best simple test I know of, that has been relatively reliable is to check voltage. It should be putting out about 13-14 if good. 12 or so is fair, but could be a problem. Less than 12 and it is likely bad.

 

[RPheezy]

Thanks for all the responses guys. I'm just gonna stop by an AutoZone and have all the electrical components checked out.

 

[scratched 95]

You'll need a new one as soon as you buy a winch - the old one just won't cut it!

Ed

 

[X~FACTOR]

For me, the indication is when I leave my stereo on for 1/2 an hour with the engine off and the car wouldn't start afterwards. I do this a lot when I work or wash the inside of my truck. Also, after 5 years, I know its about time to change before it leaves me stranded.