How to change UPS battery
Over the weekend, I changed my UPS’s battery, since the old one had stopped working and UPS would completely shut down in case of power failure or even major fluctuation.
Here is a How-To Guide on changing UPS battery, compiled from my experience:
Step 1: Buy a new UPS battery; normally UPS come with 12V 7Ah VRLA battery (refer to your UPS manual or manufacturers site for more info), also commonly known as UPS battery. You can easily buy them from any inverter/battery shop. Since many of these shops offer exchange facility, you might want to take it out the old battery first (refer to step 4 – 6) and take it with you to the shop.
Step 2: Make sure the UPS is off.
Step 3: Disconnect the UPS from wall socket and also remove your computer, monitor and other peripheral cables from the back of the UPS.
Step 4: Look for screws to open the UPS(usually present at the bottom of UPS), many good companies mention the location of these on the UPS itself or in user manual. Remove these screws and carefully put them in a secure place, to ensure that you do not lose them.
Step 5: Take out the outer shell, exposing the battery.
Step 6: There should be two connectors attached to battery’s terminals (usually clips), pull them gently in the opposite direction and after removing them, take out the old battery (make sure that you remember which wire connects to which terminal, though wires are usually color coded, with red signifying positive and black signifying negative terminal/connector).
Step 7: Remove dust present in the UPS, gently with the help of a brush or compressed air can.
Step 8: Place the new battery in the place of the old one and reattach the wires to the appropriate terminals.
Step 9: Attach the outer shell and fasten it securely in place with the help of screws, you had taken out in step 4.
Step 10: Connect the UPS to wall socket (without connecting computer or peripherals) and switch on to check, whether or not, everything is working properly. If not, then reopen the shell and check whether or not the connectors have been properly connected and everything is working.
Step 11: Switch off the UPS and reconnect the power cord of your computer and peripherals and then switch on the UPS.
Step 12: Hide any parts/bits which might have come out of the UPS and you forgot to put back in and pat yourself on the back for a job well done 
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Disclaimer These are just instructional tips, which may or may not be applicable for your UPS. I take no guarantees whatsoever, that the above written steps will work as intended or wouldn’t cause any harm to those involved or even the equipment.
Ps. Step 12 is intended as a joke; please put any misplaced/misattached parts, back into the UPS!
