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post #11 of 15 Old 06-30-2008
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I have taken batteries that appeared to be lost, such as described in this thread, and by charging using a modern charger brought them back to usuable life. Modern chargers, especially if using their restorative modes, can often revive batteries. Anyone not using a micrprocessor controlled 3 or 4 stage charger is abusing their batteries. Those basic automotive battery chargers are crude and hopelessly obsolete.
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post #12 of 15 Old 06-30-2008
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Battery on concrete

helosailor-----------Was returning faulty in warranty battery at the time.
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post #13 of 15 Old 06-30-2008
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Originally Posted by hellosailor View Post
Which magic elixir was that? I've yet to find someone who used one, and still had good batteries six months later. But I'm willing to look & learn!
I used "Battery Equaliser", but in all honesty I think reviving the batteries had a lot more to do with modern microprocessor controlled charger than with that stuff (hard to tell now, I did both things at about the same time).

I am yet to try using equalization mode of the charger - may be my battries will be even more lively then (but in any case even 70% of the full charge is plenty in my case).

Those automotive chargers are definitely not very good, and my past experience with them was pretty marginal - they certainly don't charge a battery to a full capacity and won't bring back it's useful life.
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post #14 of 15 Old 06-30-2008
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Both our boat batteries, one new last season and one at least a season old, I imagine, sat in the garage all winter. Hooked them up to the plain old Sears automotive charger prior to putting 'em back in the boat this spring. The older battery was a bit reluctant to take a full change, but, ultimately, it did. I start on "both" and the ammeter usually settles back down to "0" pretty quickly, despite the fact we've been experiencing hard starting, the 1st start of the day, so far this season. (The boat has a TrueCharge 10A [per battery] charger running off of shore power.)

We've got a commercial lawn mower. 16HP Kohler engine. It's got a fairly large (for a mower) battery in it. It sits out in the micro-barn from the last cutting in the fall to the first cutting in the spring. The original battery, after about 3 seasons of that, needed the charger for the first start in the spring. It wasn't until season 5, I think, that it finally gave up the ghost and wouldn't hold a charge anymore.

I find it hard to believe storing a new battery for several months off a charger did any serious harm to it, but I'm willing to be proven wrong.

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post #15 of 15 Old 07-01-2008
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Stsrt the motor and put a wee multimeter over the battery terminals to see if it's charging. It should read about 14V if it is charging.
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