How can i test the battaries in the ups battary system because each time the electricity goes down the system goes down its like the ups system is not working

take neg post off put a test light on wire then battary post if it lights up something is useing power start pulling fuse till light goes out it will give u an ideal what to look at but make sure u got the door swich taped down or unpluged cuz that will pull power and make test light light up

It is a battary issue, however it sounds like the engine is not charging the battary so it goes flat, or there is a drain on the battary .

try without battary......

otherways... disconnect power jack and battary and all other cable connected to computer and press and hold power butten for 38 sec then try to power on

i would try replaceing the blower motor resistor

With the engine running are you getting any voltage off the alternator? check with a multimeter. Check voltage at battery while running should be 13 volts or more.

First make sure the terminal and posts are clean and greased.

Then make sure the alternator belt is tight.

The type of battery makes no difference as long as it fits.

What matters is whether or not the alternator is putting out 13.5 volts or higher, in order to keep the battery at 12.5 volts. Put a voltmeter on the battery and rev the engine.

Hi, You have a bad alternator and or regulator. Many places will test these for free. Drive to a parts store and ask to watch them test you're electrical system. You have a two part charging system. One is the Alternator the other is the regulator. These are many times made into to one intricate system or ONE PIECE that must be replaced both at the same time. Please have your system checked before and after replacing the alternator/regulator. If you have an Advance Auto near you - or Auto Zone - call first and ask if they will check your alternator for proper operation

Have the battery and the alternator tested under a heavy electrical load. Some of the cheap battery testers will not indicate a bad or weak cell. Also your alternator may not put out enough amperage to keep up with the electrical demands placed upon it. A good battery tester is a carbon pyle tester. Good luck.

hi, guies
                 First all of  look in battary condition of ups, and that
battary sencing voltage circuit
 In your second case, please replace lithium cell with same and reconfigure the bios setup