Battery S1 Lithium-Ion battery. This 4500mAh Lithium-Ion battery serves as the power source for the S1 flash head. The battery provides up to 350 full power flashes in standard sync mode, and up to 415 full power flashes in High-Speed Sync mode.
Check that the hotshoe settings on your camera are set up correctly, refer to your camera’s user manual.
Please also make sure all contact points on both the camera and trigger are clean and are not damaged.
Please ensure that both the light and the trigger are up to date with your camera model. You can find firmware here. Your flash tube may have reached the end of its lifespan, you may need to purchase a replacement. Please also ensure that the flash tube is installed correctly - see this video on how to change the flash tube.
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