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Author Topic:   Battery Fails To Hold Charge
sheikofthesea posted 10-04-2007 01:53 AM ET (US)   Profile for sheikofthesea   Send Email to sheikofthesea  
I have twin batteries and the number one battery lost its charge.I switched over to number two and everything is fine. If I am powered up on all for a while I can switch oer to one and it will start, but when I turn off all the batteries and come back for more fun the next day and try to start it on on it doesn't work. I took out battery number one and recharged it with one of those nice chargers and stopped when the battery charger said full. Put it back in the boat started once but then the same problem started up again. What is going on?
Bella con23 posted 10-04-2007 07:55 AM ET (US)     Profile for Bella con23  Send Email to Bella con23     
What's the age of the battery?
jimh posted 10-04-2007 08:21 PM ET (US)     Profile for jimh  Send Email to jimh     
Take the battery you suspect of being a problem to a battery retailer who has test equipment which can evaluate the capacity of the battery. My guess is the battery has very little capacity. This is common in older batteries. They can take a charge but have very little capacity left.

My advice: in troubleshooting any electrical system powered by a battery the first device to test and inspect is the battery.

sheikofthesea posted 10-04-2007 10:00 PM ET (US)     Profile for sheikofthesea  Send Email to sheikofthesea     
But it is a brand new boat and a brand new battery, purchased in April of this year?
Chuck Tribolet posted 10-04-2007 10:10 PM ET (US)     Profile for Chuck Tribolet  Send Email to Chuck Tribolet     
Still possible with a newish battery, esp. if it got run
dead flat and it was a starting battery (as opposed to
deep-cycle or dual-purpose). Starting batteries do not like
to get run dead flat.

Sounds like it won't hold a charge. Or something that's
attached between it and the battery switch is running it down.

If you aren't in a rush, and digging the battery out of the
boxes is a pain, disconnect the cables from #1, charge it
up good with a 110V charger, and wait a couple of weeks. Hook
it back up and see if it works. If it doesn't, you have a
bad battery. If you do this experiment, it would be
interesting to take voltage measurements with a DVM about an
hour after it comes off the charger, and every day thereafter,
or at least about 12 hours later and just before you hook it
up again.


sheikofthesea posted 10-09-2007 12:21 AM ET (US)     Profile for sheikofthesea  Send Email to sheikofthesea     
Thanks folks and chuck for the series of reccomendations. I'll try to figure out what is going on without accidentally draining battery number 2


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