I have an Instinct 2X Tactical with solar charging, and from what I see with normal usage it prolongs battery life 1.5-2x in sunny weather. Probably if you opti

I have an Instinct 2X Tactical with solar charging, and from what I see with normal usage it prolongs battery life 1.5-2x in sunny weather. Probably if you optimize the power consumption it could fully offset the discharge, as advertised. Very much like this watch, especially with aftermarket Velcro strap. It's also surprising how useful the builtin flashlight is on a watch, much more convenient in everyday use than one in a phone.