![Amazon.com: 18650 Battery Charger, 2 Bay Smart Universal USB Battery Charger for 3.7V Rechargeable18650,26650, 18500, 17335, Ni-MH Ni-Cd A AA AAA IMR Batteries ,Power Bank ( Batteries not Including) : Electronics Amazon.com: 18650 Battery Charger, 2 Bay Smart Universal USB Battery Charger for 3.7V Rechargeable18650,26650, 18500, 17335, Ni-MH Ni-Cd A AA AAA IMR Batteries ,Power Bank ( Batteries not Including) : Electronics](https://m.media-amazon.com/images/I/71ESa8MfTdL.jpg)
Amazon.com: 18650 Battery Charger, 2 Bay Smart Universal USB Battery Charger for 3.7V Rechargeable18650,26650, 18500, 17335, Ni-MH Ni-Cd A AA AAA IMR Batteries ,Power Bank ( Batteries not Including) : Electronics
![Amazon.com: Speedy 18650 Battery Charger XTAR PB2C USB Output Function, Portable Li-ion 18650 Battery Charger Box w/USB Port and LED Display for all 18650 Batteries(Batteries NOT included) : Electronics Amazon.com: Speedy 18650 Battery Charger XTAR PB2C USB Output Function, Portable Li-ion 18650 Battery Charger Box w/USB Port and LED Display for all 18650 Batteries(Batteries NOT included) : Electronics](https://m.media-amazon.com/images/I/51XuPxle5cL._AC_UF350,350_QL80_.jpg)
Amazon.com: Speedy 18650 Battery Charger XTAR PB2C USB Output Function, Portable Li-ion 18650 Battery Charger Box w/USB Port and LED Display for all 18650 Batteries(Batteries NOT included) : Electronics
![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 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](https://preview.redd.it/ive-been-salvaging-these-disposable-vapes-for-the-3-7v-v0-14q8hgq44u891.jpg?width=640&crop=smart&auto=webp&s=b6b2f9f7c7ad91757a73c6515c7b9607e8871bf7)
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
![PSA: USB Charging for Internal Battery Devices. How it works, what's safe, what isn't, and why things go wrong. - Chasin' Vapor PSA: USB Charging for Internal Battery Devices. How it works, what's safe, what isn't, and why things go wrong. - Chasin' Vapor](http://www.chasinvapor.com/wp-content/uploads/2018/07/1-750x675.jpg)