It has been suggested on forums like "candlepower", that one of the main reasons American companies that put their name on so many battery products, don't offer any rechargeable Li-Ion batteries and chargers, are the "potential" for problems, with some of the volatile chemistries. What I mean are companies like Energizer, Duracell, etc. while their products are most likely not made in USA, if marketed in the US, those companies can be held legally responsible for those products. You will find some ONE TIME USE Li-Ion batteries from those companies, but I have not seen any rechargeable ones. These are single batteries, used once and then thrown away. Obviously, the rather lax legal system of these imported Chinese products does not seem to apply. If there are any rechargeable Li-Ion batteries and chargers being branded by a US company, like either of the two I mentioned, I would be interested in seeing a link to them? If not, then I suspect the liability issue to be the main reason they are not marketing these products that us vapers rely on. Thus the disclaimers on most web sites for these rechargeable battery products.