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Old 07-07-2013, 07:25 PM   #1
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Default Battery experts help!

Replacing my two marine batteries in the offshore boat (been 4 years, it's about time.)

Bought two Excel marine batts, 1000 amps from Napa. Put them on the charger to bring them up to 100%. 1 was at 85% the other at 90% out of the store. Got them to 100% on trickle charge (low and slow) then let them sit for 2 days. Plugged back up and 1 was at 95% on 1, but 85% on the other. Then I noticed the battery acid was bubbling out the low battery. Plugged up the other one and noticed it was bubbling as well.

Took them back to Napa, counter guy told me they were fully charged when they left the store. But he swapped them out for me.

Just put one on the charger, it's at 85% also (is that fully charged do you think?) I'm used to batteries retaining a 100% charge overnight at least.

My charger is a high-quality Schumacher with battery tender mode. It shuts off at 100% but maintains that if plugged in.

Now I'm a bit worried about using that brand of battery, though I've used them for years. Opinions?
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Old 07-07-2013, 07:57 PM   #2
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I just bought a new Glass Matt Battery for my kayak. The battery store owner is a friend of my employer. he asked what I was charging with and I told him a nice Schumacher smart charger.... He shook his head and said that Schumachers were not very good chargers. not very "smart" and often show inaccurate charge %. Thus often over and under charging batteries.

I do not know a good solution, but he did say that my BPS dual onboard charger was better. I got it in trade and have never used it, so I cant say how it works. Looks like we may both be in the market for a charger...

PS, he was not trying to sell me a charger.

Last edited by NoMoSurf; 07-07-2013 at 08:01 PM.
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Old 07-07-2013, 09:02 PM   #3
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Thanks, that's interesting. I have a BPS onboard on a bay boat seems to work fine.
In fact I have one in the box I can't figure out how to put on the big boat. Maybe I'll figure out how to mount that, meanwhile I could use it with alligator clips.
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Old 07-07-2013, 09:06 PM   #4
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I have been having good luck with walmart batterys....I also use old school solid state chargers,I have 3 of the old ones. They have worked well for me for years.
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Old 07-07-2013, 09:48 PM   #5
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Interstate all the way never even question them
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Old 07-08-2013, 07:49 PM   #6
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Default Batteries

They never have a full charge off the shelf unless someone has just charged them Usually between 70 to 80 percent according to the Exide guy
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Old 07-08-2013, 10:18 PM   #7
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Most all the batteries sold are made outside the US. At the battery store I work at we sell batteries made by East Penn Manufacturing. These batteries are made in Pennsylvania and are top quality. As far as batteries on the shelf being 70-80%, that is very common with your Exide and Interstate products because they are manufactured outside the US and have to be shipped long distances to the distributors.
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Old 07-08-2013, 10:26 PM   #8
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it sounds like your worrying about the small stuff. Put them in and use them.
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Old 07-08-2013, 10:35 PM   #9
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Quote:
Originally Posted by amarcafina View Post
it sounds like your worrying about the small stuff. Put them in and use them.
Ditto.
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Old 07-09-2013, 12:00 AM   #10
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I had the same charger and after about a year it started giving false readings and started overcharging because it wouldn't stop charging . now I use a manual charger and a hydrometer
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