How can I measure battery life with multimeter.
by jpieczonka on 11/13/05 at 22:16:01
Question: Is there a way to measure battery life with a multimeter. The battery in question is for an OneAC 400 UPS. I am a service contractor for a private company and normally, for preventive maintenance I am suppose to disconnect the battery to see how long the UPS will stay up for. I service C-Stores so when the battery dies then so does the register attached to the UPS. I need a better way to measure the life of the batteries! Thanks.
Re: How can I measure battery life with multimeter
by Robert Fogt on 11/14/05 at 04:14:27
I do not know about UPS batteries, but with automotive batteries you can easily check how charged they are. So I am sure it is possible with a UPS battery, just not sure of the steps you would need to take.
My RV has a battery charge indicator, it goes by voltage. If the battery is fully charged the voltage will be slightly higher (I think 13.4 volts for a fully charged battery), while if the voltage drops below 12 the battery is empty. The voltage is read and displays it on a gauge from empty to full.
Also, most expensive automotive battery chargers have tests to see how well a battery holds a charge, to see if the battery is about to go bad. You would need something like that designed especially for UPS batteries.