Photo lithium batteries are a great alternative for applications that draw a lot of power, like cameras and their flashes. In a high power application, lithium batteries can have a lifetime up to 9 times greater than the equivalent Alkaline battery. However, they offer only the same life as Alkaline in low power products such as clocks and pagers. In this case, you might be unnecessarily spending extra money. If you are looking for batteries for a low drain application, please look at Alkaline Batteries, or Rechargeables.