1. I'd try and find a flashlight that shot out a death ray as one of the options (instead of a SOS).
2. I'd try and find a flashlight, or have one engineered that you could use as a welding torch if needed.
3. I'd try and find a flashlight that had the energy and intensity to light the sky up so bright, it would be like a sunny day in the middle of the night. The heat sink on this thing may be the only issue.
Other than that, I'd just look for something more crazy power wise, yet still only using one battery.