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#1
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Testing Rechargeable Batteries with a Multimeter
I have several large 12V 7.5AH rechargeable batteries that were left to
me to power the automation system in the house. Problem is, the sytem says the battery is low, and while I know one of the batteries is a new one and therefore good, I don't know which one. I have a multimeter and I'd like to use it to test the batteries to see which one is the best to use in the system. Excuse my ignorance, but I don't know what setting on the multimeter to set it to to test the battery. Additionally, since the problem may be with the charger itself and the batteries may be fine, the batteries may not be charged at all. Is there some way to test to see if the batteries are good even if they aren't charged? thanks! |
#2
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Testing Rechargeable Batteries with a Multimeter
you need to test not only for voltage but current capacity.
set meter at something above 15 volts dc and check disconnected battery. shouuld get at least 12 volts or thereabouts now connect battery plug in device, check voltage again, should be around 13.8, the voltage the battery charges at. now let us know what you find and feel free to e mail me batterys last only a few years at best, yours are probably both bad |
#3
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Testing Rechargeable Batteries with a Multimeter
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#4
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Testing Rechargeable Batteries with a Multimeter
I have several batteries for my rechargeable drill. After several years they
started loosing the charge faster and faster. My son told me that the instructions with his DeWalt said that if this happens, to leave the battery in the charger for a few days after the charge light went out. This seems to have solved my rapid discharging problem. wrote in message oups.com... I have several large 12V 7.5AH rechargeable batteries that were left to me to power the automation system in the house. Problem is, the sytem says the battery is low, and while I know one of the batteries is a new one and therefore good, I don't know which one. I have a multimeter and I'd like to use it to test the batteries to see which one is the best to use in the system. Excuse my ignorance, but I don't know what setting on the multimeter to set it to to test the battery. Additionally, since the problem may be with the charger itself and the batteries may be fine, the batteries may not be charged at all. Is there some way to test to see if the batteries are good even if they aren't charged? thanks! |
#5
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Testing Rechargeable Batteries with a Multimeter
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