Lithium ion batteries power many of the devices we use every dayfrom phones and laptops to e bikes and power tools. While they are generally safe, improper use, charging, or storage can increase the I've been salvaging these disposable vapes for the 3.7v 500mAh lithium batteries inside. They can be used to power small electronic projects with the appropriate charging circuit and voltage converter. : r diyelectronics Can You Take a Vape on a Plane HV A quick charge power bank made from recycled vape batteries. : r functionalprint