Hi all. I was given an old APC backup - 600SmartUp. I wasn't told whether it worked or not - it doesn't. I'm assuming that the internal battery is dead. Is the thing junk? Thanks, kevin A while back I was debating whether to toss my old battery back up or not. (Proxima circa 1991) Same thing it wasn't working, I decided to open up the case and check it out. It turned out that there was two very easily removabile batteries inside , I was able to order replacements from Radio Shack for about $ 40.00 . When the batteries were replaced & charged up it worked like new. I've been using it on my 2001 Quick Silver ever since. I also was checking out Fry's Electronics and noticed that they had replacement ups batteries. _________________________________________________________________ Lose those love handles! MSN Fitness shows you two moves to slim your waist. http://fitness.msn.com/articles/feeds/article.aspx?dept=exercise&article=et_pv_030104_lovehandles