This very small, super light weight flashlight far exceeded my expectations for brightness and overall size and weight, and price. It is way brighter than I expected. It comes without any instructions, but hey it's just a flashlight. It has a red light when charging that then goes out or it seems to turn maybe blue. Anyway, you can verify when it is fully charged. There is no indicator when it is undercharged or needs charging. It has a Lithium Ion battery which is the only way to go. Lithium Ion is superior technology for long life and Lithium holds a charge quite incredibly. I have a motorcycle with a Lithium Ion battery, and every time I check it for discharge, it is fully charged. Amazing. My drill has a lithium battery, and when I charge it, it takes only a few minutes indicating that it is close to fully charged. I bought this flashlight due to it having a Lithium battery, as many still have alkaline batteries, and I expect it to last very long and rarely need a charge. The cases that come with these are a nice little addition also. I will be buying many more of these.This flashlight is small.. maybe 3 inches long.. only 3 modes,, on, strobe, cob.. So,, no intensity adjustments available. No magnet, so not mountable..The light itself is not as bright as claimed,, wide angle diffuses about 50ft out and the Cob about 30ft out to useless,, however the focused beam will light objects 200ft awayDue to its all on or all off design,, main light lasted about 30-40 min,, Cob about 45-60 min. Until the light is out of powerThis is a convenient little light,, for a 10-20 min emergency,, it fits almost anywhere.. pocket, purse, glovebox, center console, door pocket, backpack..For the price,, size, rechargeability,, lumens..I actually bought 2 more,, 1 for each car and 1 for the junk drawer..This flashlight is a great complement for your car EDC/BOB. Made of good materialEs chica pero muy manuable y alumbra bastante.Gracias.BrightnessLove this flashlight, very bright for it's size. The battery lasts a long time but takes awhile to charge. The side LED panel is bright enough to light a small room. I have 6 of them.Love this flashlights ? they are small and lightweight but super bright ?Good flashlight works as shown.