Repairing an Uninterrupted Power Supply (UPS)

[burger2227]

I had a Cyberpower UPS unit backing up my main computers in my desk until it recently started acting up. The battery backup outlets quit altogether!

The internal battery was apparently dead so I removed the 5 screws from the back and had a look. The first thing I noticed was how much empty space there was!

After removing the 12 volt battery which was glued to the bottom part, I decided to jump start the unit with my car battery jumper unit.

Since the battery terminals were insulated I used my meter probes to stick into the rolled ends of the female spade lugs and used jumpers to the battery clamps.

The square area above the circuit board can hold a battery 6" Long by 3" High and almost 3" wide if need be. I couldn't find any cheap ones the size of the old one.
I had just purchased a new replacement Cyberpower unit for $41 with shipping so I didn't want to pay $36 for an identical replacement battery either.

I plugged in a 120 volt test lamp to see if it would generate enough voltage while 12 volts was applied instead of the old battery:

After pushing the power button on, the unit beeped 2 long times and then about every minute or so after. The 120 volt night light worked too!

So I ordered a new battery for $15 from Ebay. Length 5.25 inches, Width 2.63 inches, Height 2.44 inches and Weight 3.20 lbs.:

The old battery was only 4 inches Long by 1-7/8 inches wide by 2.5 inches high. Weight was about 2.5 pounds.

The original Cyberpower 425 VA unit cost me $25 on Black Friday about 4 years ago. I can't figure out why the battery backup outlets would not
keep working if there was 120 volts going into the unit! The battery should only affect performance when there is no electrical power...

[burger2227]

I received the battery today and cut out the plastic bracket in the center of the larger area I will use to hold it:

Above, the battery width also caused me to have to cut the braces on the right side in half also.

This is the final battery placement with it wired up. The wires weren't long enough to hook them up the other way:

I used some electrical tape to keep the battery wires from twisting and coming off the connectors.

After placing the bottom half of the casing on, I found that another bracket needed to be cut down a bit:

The diamond cutting wheel cut through the plastic like butter. I didn't want to cut it all off for a tight fit.

I tested the battery by unplugging the unit after it had charged up for an hour. It lasted more than 45 minutes with just a night light.

So now I have two Cyberpower 425 Battery and surge backups and I paid a total of $40 for each with one lasting 4 years now that it is fixed.

[burger2227]

I decided to use the extra UPS to back up my telephone land line which is Magic Jack with 2 Radio Shack DECT6 cordless phones:

Left to right: DECT6 phone base power, Magic Jack USB(phone & router cables), Master computer power switch and Verizon WIFI router power.

Also every time I lost DECT6 phone base power previously I had to reset the Date and Time! Thankfully it keeps the stored numbers!

The Magic Jack unit is plugged into a USB replacement power supply as the original unit burnt out after only a year.
It also requires a network cable connection to the cable modem-router, the thin black cable supplied by them on the right.
I wish that Magic Jack would make a WIFI unit so that the phone base set can be anywhere in the house!
I also couldn't plug the oblong Magic Jack box into the router's USB power supply as one antenna got in the way.

Today I'm going to try to create a wireless connection to it using the Vonets WIFI repeater and see what happens.
The result wasn't good!
http://petesqbsite.com/phpBB3/viewtopic ... 347#p23347

The computer Master Switch powers a Windows 98 and extra XP machine, monitor and sound amplifier. I rarely use the computers.

The DECT6 phone displays the time as AM or PM and date as 2/04. Why I had to tell it the 2 digit year is beyond me!:

I tested the phones out with the apartment power off and they still worked, but had a slight static sound, probably from the UPS AC inverter.
I even lost the FIOS TV signal but the wireless router still worked enough to allow phone calls!