Ive been ordering these batteries for a while now, i use them with the 4 Disc-O Night Ize spoke lits that attach to the spokes of my Road bike. I usually ride Solely in the early morning and late night 10-4am In Berkeley, CA as well as in El cerrito, albany and even Richmond. I feel like these batteries are pretty decent for the price point (4.75 for a pack of 25) It takes a set of 8 to fill my spoke lits. They run out fairly quickly i usually only get about 5 or so 2.5 hour bike rides out of a set. Since they are so cheap it doesn't much bother me that i have to change them fairly often. I change them before they totally die out because the lights for my bicycle change color, after the batteries start to drain the lights stop changing through all 8 colors and only do 4 like red-blue-green-light blue. If you have a bicycling device that requires these types of batteries to light up i highly recommend purchasing these batteries. =]