> Definitely #3. Counterfeit 18650 cells is a serious problem and anyone who has delved deeply into the e-cig/vaping community is already aware of this > a lot

> Definitely #3. Counterfeit 18650 cells is a serious problem and anyone who has delved deeply into the e-cig/vaping community is already aware of this > a lot of hobbyist communities where having a quality supply chain is safety critical. Thanks, it makes lots of sense. Personally, I do play with electronics, but mainly radio and digital devices, not hobbyists RC toys and models. So I didn't know counterfeit cells in the supply chain is so serious, that it's even a trouble in the hobbyists community (where most people know what they're doing). When playing with homebrew electronics, I actively avoid lithium-ion batteries and use Ni-MH when possible, as I know one mistake can be fatal. I realized my decision is correct and I should continue doing it.