Canon Warns Against Lithium Batteries in Flashes

Canon has issued a service notice warning photographers not to use lithium or lithium-ion batteries in its flash units, a precaution that applies across the industry to brands like Sony, Panasonic, and Nikon. Using these batteries in portable strobes and speedlights can cause overheating, reduced performance, and potentially damage gear or pose a fire risk. Manufacturers generally recommend Ni-MH rechargeable batteries for safer and more consistent performance in flash units.