SureFire HellFighter 4

The HellFighter 4 (HF4) uses a rugged high intensity discharge (HID) lamp that is virtually immune to failure from recoil, vibration, or impact, since it has no filament to break or burn out. However, the HF4 features some improvements, the most significant being an integral rechargeable backup battery that can run the HellFighter 4 for 30 minutes at full output using no external power source. The integral battery not only provides a backup in case of external power failure, but also makes the HF4 more compact and convenient when used as a handheld spotlight/searchlight.