I have an APC UPS SUA1000I, which is now discontinued. It's been in storage for quite some time now as it's batteries had died and my folks which were using the system to which it was attached, repalced it with a new UPS. Today I took it out and saw that the batteries had lot of carbon on contacts, greenish white powder and they were bloated. Now looking for replacement batteries showed just a couple of links and only 1 in stock and that too for 20,000 ! Any idea where I can source batteries for it at cheaper rates?