Quoting trphoto
We have 10 computers at the office all on separate UPS's. we also have about 10 dead UPS's (sealed batteries are dead) laying about the office.
Is there any reason why we shouldn't buy a 300 amp/hour deep cycle battery, similar to what is used on solar installations, and take those 10 cheap UPS's with dead batteries, pull out the batteries and wire them all to the deep cycle battery. Then put a charger on the deep cycle battery. Shouldn't the deep cycle battery run all those UPS's for a good amount of time in case of a power outage?
Been looking around the Internet and wondering why this isn't done.
I bought a UPS from an auction, paid a US dollar for it. Dead battery. Went to local store (Walmart) and bought 6 12v lawn mower batterys. Hooked them up in parrellel (UPS took 12v) and was able to run from it for 3 hours at a time when the power went out. It finally died after 2 years of service... right after I got a laser printer, I guess I went over the max draw, didn't realise how much they pulled.