it varies from camera to camera which batteries to use.
Some will last a whole day on just standard duracells (btw, duracells really arent the best batteries you can buy no matter how muc hthey try to drum it into people, the kodak batteries are superb). Others wont even turn on using standard durracels.
Make sure they are alkaline and not something else. Also, depending on what batteries your camera takes (saying it takes 4xAAs isnt good) it may also take lithium batteries. The CRV-3 batteries work in most cameras that take 2x AAs. they last for months!