Unlike traditional alkaline and 1.2V NiMH batteries that experience voltage drops over time, the rechargeable 1.5V Li-ion batteries can maintain a stable 1.5V output throughout the usage, this characteristic makes these 1.5V Li-ion batteries are very suitable for devices that require long-term, steady high-voltage output. You may have a multitude of devices that can benefit from the higher voltage and medium draw. Has anyone tried the rechargeable 1.5V Li-ion AA/AAA batteries in your dive lights? Btw, what devices do you want to use the rechargeable 1.5V Li-ion batteries on? Welcome to comment below!