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Posting a reply to: GPS Draining Starting Battery Question?

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Ball Cap

Posted 6/14/2010 5:08 PM (#445486)
Subject: GPS Draining Starting Battery Question?

Hi:

I've been running a new Lowrance HDS7 since the end of last year. I have noticed this thing drains my starting battery.

I had someone test the battery and they told me it's fine.

My question is do these new GPS units use alot more juice than just an old depth finder?

When I charge the battery at home and then use it for a few days, it's fine.

But after a few days, it "reboots" when I turn the big motor on, so I know the battery is running low and the unit flashes off when the big motor draws on the battery to start.

Is my battery bad? Do I need to get a better beefed up battery?

How do I know if my alternator is working on the big motor?

Any help would be greatly appreciated.

Thanks