a.k.a brainstorm on Twitter: "Discarded vaping devices come with free rechargeable Li-Ion batteries with varying capacities. Those can be safely charged with a single cell TP-4056 charger (with battery protection ICs) and
Just got this battery for a friend, it looks like the LiPO construction, but it's hard and everywhere it says it's an Li ION, so what is it? : r/AskElectronics
Sheng Li energy 18650 battery 3.7V battery scrap 2200mAh capacity cell accept OEM/ODM - tradechina.com
Mooch - Smok Stick X8 and Stick V8 teardown. Due to a couple of incidents of the popular Smok Stick V8 and X8 mods catching fire while charging I decided to check
Source 23600 3000mah 3.7v battery on m.alibaba.com
Low Cost 18650 3000mAh 3.7V Lithium Ion Energy Storage Battery More 500 Life Cycles - China 18650 3000mAh Lithium Battery, Deep Cycle 500 Time Lithium Battery | Made-in-China.com