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 Extracting Free Lithium ion Batteries From Used Vapes HAKADI 18650 3.7V 2900mAh Rechargeable Lithium Ion Battery For Flashlight Electric Bicycle Laser Pointer 3C 5C High Power Discharge Sony Murata VTC6 18650 3000mAh 15A Battery Advances in Lithium ion Battery Technology and the Evolution of Rechargeable Vape Devices Molicel INR18650 P30B 3000mAh 30A button top
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