I PUSHED THE SAME set of Uniross 2100mAh batteries for two days of picture taking and haven't stopped to recharge. I shot 82 eight-megapixel images using flash and fast-shoot settings during the Ince Wedding. Although the batteries cannot deliver rapid-fire flash sequences, they do the business for consecutive point, zoom and shoot. I got 27 usable images from my 82 attempts on Saturday and another 17 on Sunday. I had given the rechargeable batteries an overnight top-up in my Uniross RC101129 recharger before starting and they kept shooting. Uniross AA 2100mAh batteries take 18 hours to recharge. The 2700 mAh batteries need 23 hours to recharge in the compact charger made by Uniross.
Bonus Link: my S602z photos on Flickr for Irishblogs.