I have 4 of they . they constantly have problem . bulb be easily shatter . the proprietary bulb be expensive . the rubber protector fall of of one . if a battery leak you can just trow the flashlight away , the inside be so tight the battery get stick forever . they guarantee be basically useless as they 'll blame the battery manufacturer . the aluminum machining make get the bottom on and off difficult , easily cross thread . my one star review be because they do not deserve they reputation . it be a good flashlight but they have not do anything for year to improve all the problem . do not expect they to last longer than other quality flashlight .