Surefire 123a rechargeable lithium phosphate (lifepo 4) batteries & usb charger - SureFire 123A Lithium Iron Phosphate Rechargeable Batteries

These batteries are far superior to lithium ion batteries first off. They last forever. these ones in particular are lower mAh (450) at 3.2 volts but the upside is you can constantly recharge them and you can do it usb. I bought 2 of the batteries that come with the usb chargers. They are micro usb to usb male which can be charged by AC wall chargers, DC car chargers, laptops, solar, or battery banks. These things can accept several amperage types. It has its own built in regulating chip. These batteries in general can accept several rated inputs of power without frying them. They are also non heating meaning they handle discharge and recharge completely different from lithium ions. Life of these batteries is about 15 to 20 years as compared to lithium ions 6-8 years and often lithium ions dont last even a couple years for me. HIGHLY recommend you pick some of these up if you own anything that requires 123 batteries. Its best to have a couple pairs so you can charge a pair while you use a pair. If you can find these in higher milliamps (mAh) then do it.