battery drain, how to check?

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Ohmz

Copper - Posts: 193

Joined: May 09, 2002

Location: United States

Posted: December 19, 2002 at 8:42 AM / IP Logged

Hey guys! I have a simple question. I have a customer that says his battery is running low. I can't recall the reading I'm suppose to get on my DMM when there is nothing in the vehicle that is making the battery to run low. Can someone remind me! Thanks!

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Velocity Motors

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Joined: March 08, 2002

Location: Manitoba, Canada

Posted: December 19, 2002 at 9:03 AM / IP Logged

A healthy battery is about 12.2 - 12.8 volts
A not so good battery ( but still operational ) is about 11.4 - 12 volts
A battery needing replacement will read under 11 volts ( about 10.5 - 10.8 )

I hope this is what you were wanting.

Jeff

Velocity Custom Home Theater

Mobile Audio/Video Specialist

Morden, Manitoba CANADA

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DanDan

Copper - Posts: 125

Joined: September 25, 2002

Location: United States

Posted: December 19, 2002 at 8:00 PM / IP Logged

Anything over a 25ma draw is considered parasitic. Use your DC ma current setting on your dmm. Put it in line with your battery to check to see if the battery has a parasitic draw.

Dan

Ohmz

Copper - Posts: 193

Joined: May 09, 2002

Location: United States

Posted: December 20, 2002 at 12:16 PM / IP Logged

Thanks Jeff / Dan. This should be helpful enough. I will check over the weekend. I'm pretty sure there is something drawing from the battery because the vehicle was in a recent accident and was ok before.

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battery drain, how to check?

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