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icac210 • Aug 9, 2007

UPS battery Test

Hi, is there any way to test the battery of a UPS without opening the case? I need to use a multimeter to test the battery voltage and test it again hours later to see if it is the same or losing charge. But how can I use the multimeter to test it without opening the case? It is a very standard APC UPS I am talking about here.
Any advice is appreciated
For the testing of any battery following data is required.

Cuurent Rating - in Ampere Hour.
Voltage Rating - in Volts.

Suppose a battery of rating 40 Ah of 12 Volts.

You connect the load of 40 A to battery and take the voltage reading.

Voltage should be same during the load and no load. Multimeter must have to show constant reading.

The given test is not more than 5 seconds.
If it is not showing constant the battery may be not in full charge condition or may be manufacturing defects.
See the ampere hour and voltage of battery.
Connect any D.C.load and multimeter in its terminals.
Multimeter must show the same voltage during no load & full load.

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