A mobile app to manage your camera's battery might sound like overkill, but if you're a professional photographer that counts on every last little bit of battery life on a shoot then you probably want all that information at the ready. Nitecore's NFZ100 Smart Battery gives you information on the overall battery health with status for battery health, power remaining, voltage, charge cycles and more. It even has a storage mode that discharges the battery to 70% to enhance the lifespan of the battery.
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The camera can shoot at up to 20fps with AF/AE tracking.