I only used it once to chop an onion, but so far so good.  I can't attest to battery life, but I can say that it is very convenient.  I have 2 other food processors, an 11-cup one and a small 2-cup one.  The 11-cup one works well, however, it's a pain in the butt to take out and assemble and clean and put away.  The 2-cup one is small and also does the job, but too small to hold larger quantities.  So far, the 5-cup has proven to be just what I need.