Bests & Worsts Reviews from Amazon

Surefire batteries are made in the USA by Panasonic (last I checked), but they clearly have a deal where they get the best-quality units from every production run. They last a long time and they perform consistently, maintaining their voltage until they're completely dead. Oh, and they kinda look like shotgun shells lined up in their little flip-top box. =) I wish they weren't $2 apiece, but honestly, all the cheaper brands have issues with one cell holding a noticeably different amount of charge than the next, and considering other brands of high-quality CR123 batteries cost 3x as much in the supermarket, $2 apiece for these is still a bargain. If you buy these you'll save money just by not having to replace them as often. By the way, if you have any devices that use ANY kind of lithium battery in a multi-cell configuration (even the 1.5V Energizer Lithium AAs), you should know that one lithium battery will block the flow of electricity from the other batteries when it finally wears out. DO NOT throw away all of the batteries in a device that suddenly stops working -- chances are, only one of the batteries is really dead, and the others have plenty of charge left. You can save a lot of money by testing used batteries before you throw them away.