Specifically designed for Canon's Speedlite EL-1, the LP-EL lithium-ion battery pack offers powerful and reliable power to your flashgun. The battery offers up to 2345 flashes on a single charge (335 full-power flashes) and when fully charged, it will provide a flash recycle time of approx. 0.9 seconds. This speed and power allow you to get creative with your shooting and there's also the option for optical wireless connectivity, too. Finally, the charge of your battery can be checked via the EL-1 display, offering often vital information that will give you advanced notice of when you need to replace or charge your battery.