Charging 12v lead acid battery


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Old 03-17-14, 02:56 PM
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Charging 12v lead acid battery

I have lost the charger for a 12v 4ah lead acid battery. I have many other battery chargers at home and I'm wondering if I can use any of them to charge the battery. Is there a specific volt and amp output range that the charger needs to have in order to charge the battery
 
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Old 03-17-14, 09:33 PM
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It may take a little experimenting with your chargers to see which one, if any, works well.
A 12vdc at 50-100ma would be ok. Up to 500ma should be ok. You can't exceed 2.40v per cell or 14.4vdc. An ideal float voltage is 2.25v per cell or 13.5vdc.

What do you have around that's near 12vdc. List the voltage and current that's on the unit.
 
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Old 03-18-14, 10:12 AM
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I have a 12vdc 200ma lead acid battery charger for my lawn mower. I also have a 14.4v smart car battery charger but it doesn't detect the battery for some reason.
 
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Old 03-18-14, 10:17 AM
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The 12vdc 200ma charger should work well. The smart charger is either defective or there is not enough voltage in the battery to turn it on. Many smart charger need to see better than 10v on the battery or they'll ignore it.
 
 

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