Taking a very heavy brick-sized battery to work to recycle in the e-waste bin. This was inside the battery backup case (itself very heavy!) that I shipped yesterday after selling it on eBay. I provided information in the auction about the battery and where to find a replacement. This one no longer holds a charge. I decided it wasn't worth holding onto this backup and putting in a new battery. Fingers crossed I don't soon discover a need for it!

SRS