A Compact LED flashlight is a small flashlight with multiple heads and a single AA or AAA battery, or a pocket flashlight with three button batteries or a keychain flashlight. These compact LED flashlights also have poor focusing effects and consume a lot of power, but they are useful for temporary emergency lighting or night viewing in cities where they have not been used for a long time. This kind of flashlight because of use time is not much, often store up temporary use, so the best sealed alkaline batteries (generally can be stored for two or three years without failure) , do not use ordinary carbon batteries, do not use for a long time will flow out of the electrolyte and damage the flashlight.
