Review on RISEMART Mini LED Keychain Flashlight - Pack of 10 Black, Ultra Bright Key Ring Tiny Light Torch with Batteries Included by Nick Moody

I don't know how the seller makes money with these things. Two CR2016 batteries retail for at least a dollar each, and each flashlight comes with them pre-installed. The light output is 9 lumens (had to dig around to find that spec) which is plenty of brightness for a petite keychain flashlight. All of this in a tiny package, barely bigger than the batteries themselves, is incredible. Speaking of packaging, 10 lights are well-packaged in a small box that is unlikely to be damaged in transit. If you're looking for a great inexpensive keychain flashlight, grab a few boxes before the seller realizes they're too cheap.