DULEX DZ68 Super Bright XML Q5 Zoomable LED Flashlight, 3 Modes mini 7W Pocket-Sized 300LM Rechargeable Handheld Flashlights - 1 Pack There is no need to buy an alternative battery, the regular AA works excellent. The beam can be focused to be larger or smaller, by simply turning the front lens. WELL PORTABLE: Tail-switch which is also very responsive and easy to use, Pocket-Sized. WEATHER, WATER, & SHOCK RESISTANT: Designed for rough handling, it's perfect for use in the rain, snow or emergency situations. It can be completely submerged under water for a short period. MUL-TIFUNCTIONAL: DULEX XML Q5 LED Flashlight is a very nice multifunctional flashlight. around the house, for your vehicle, while hiking, camping, or backpacking this is an excellent option.