A friend of mine is looking for a solution where we can install an IP camera inside a waterproof box that is powered by a battery and can be viewed remotely on his phone. He would like the camera to last at least a week and will look something like this.

I am thinking either a deep cycle battery (unless anyone has any lighter suggestions), POE + airport card, but I am not really sure if that's the best solution.
Does anyone have any suggestions or ideas?

I am thinking either a deep cycle battery (unless anyone has any lighter suggestions), POE + airport card, but I am not really sure if that's the best solution.
Does anyone have any suggestions or ideas?