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Go Back   SailNet Community > On Board > Gear & Maintenance > Electrical Systems
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  #1  
Old 04-17-2013
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Battery help!

OK - I'll start be admitting to being bad and not charging my batteries over the winter. They were stored in my front hall closet. (I did charge them once in December). I put battery equalizer in the one battery (on the recommendation of the marine supply store) and plugged in the smart charger last evening. it started our showing 70% capacity.

I just checked on it almost 24 hours later and it is only at 90% and there is a bit of bubbling coming out one cap (covers 3 holes). The current charging rate appears to be .5 amps (I believe that is what it is).

Is this something I should be concerned about? or should I just keep charging?
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Old 04-17-2013
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Re: Battery help!

The last 5 - 10% of charge takes a long time for a battery to absorb.
You do not need high amperage to top them off rather a low amp trickle charge.

You will want to add distilled water to your wet cells once charged up.
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Old 04-17-2013
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Re: Battery help!

Quote:
Originally Posted by CalebD View Post
The last 5 - 10% of charge takes a long time for a battery to absorb.
You do not need high amperage to top them off rather a low amp trickle charge.

You will want to add distilled water to your wet cells once charged up.
Exactly. Worry if it never gets to 100 - but in practice figure on using it between 50-80%.
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Old 04-17-2013
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Re: Battery help!

You want to add water if the level is low. Don't wait until the charging is finished. If you think it may be low, check! It costs nothing to check and a lot to replace a battery.

Also, NEVER EVER USE A FLAME TO CHECK THE LEVEL. No lighters, matches, or anything else that might make so much as a spark near a charging battery. If you do, you may very well find yourself in the midst of an acid shower with plastic shrapnel to open your hide to let the acid in to add to the burn.

I have been present when a battery exploded when the charger clips were removed with power on the charger. Accident investigation postulated that the spark created when the charger clips were removed, ignited hydrogen and oxygen liberated by battery charging, causing the explosion.

Luckily, I was about 20 feet away and outside the debris field. No one was seriously hurt but the safety shower and first aid kit got used that day.

Have FUN, not HURT!
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Last edited by OPossumTX; 04-17-2013 at 10:07 PM.
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