Trijicon does not provide an actual value as to what the adjustments within the digital reticle are. They offer a one shot zero option and that is how they recommend you zero the optic when using it.
The actual amount of light does not affect range as much as things like rain and actual temperature will affect it. It is hard to provide exact ranges, but you should be detecting heat signatures out past 500 yards with this optic. The range to actually identify what the heat signature is will be less.
Trijicon does not offer a rechargeable battery kit for this scope.
Trijicon makes strong quality optics that can handle large calibers.
The screen display is in black and white, only.
It can be used in daylight, it will still show an image based heat signatures of your surroundings.
There are multiple reticles available within the unit including both simple and complex reticles. Some of the complex reticles are the TCR, TSR, TDR.