I need #18650batteries, used in (among other things) Electrolumens Firesword V and NiteCore P12 Flashlights. These are not something you get at a Safeway or Walgreens. You can order them from Amazon but the brand for most of THEM are labeled as "Generic", which instills as about much confidence as having Kristi Noem as your weapons range safety officer. Suggestions of a good source for 18650 batteries?