The HX5 flashlight is compatible with not just standard alkaline AA, but with rechargeable NiMH or rechargeable lithium 14,500's as well (NiMH & lithium not included). With the lithium 14,500 cells, the lumen output jumps nearly three times as bright as with the alkaline battery. Also unique to the HX5 Flashlight is a two-way clip that makes it easy to clip in either direction on your pockets or even the bill of your hat. Using our pure beam focusing system with slide focus, this light can easily transition from flood to spot modes with one hand. The HX5 flashlight is impact-resistant, weather-resistant and its LED is virtually unbreakable. The HX5 flashlight is backed by Coast's lifetime warranty against defects in materials and workmanship.