Time for a new battery???

[dallas007]

I have a 2004 H2 w/ 27,000 miles. That makes my battery almost 5 years old. So my question is while I have no indication of any problems now, is it smarter to replace it now while I can do it in my garage vs. finding it dead while I am sitting in the middle of the desert. I hate to toss a perfectly good battery away. Any suggestions??