18650 Li-ion batteries -- reputable brands and chargers
I understand that there is something of a "Wild West" of varying quality when it comes to these batteries -- many people selling salvaged or substandard batteries, actual mAh ratings not as advertised, etc. I bought a few a couple of years ago from Amazon (with a charger) but several appeared to be DOA and the charger partially broke after one use.
Does anyone have recommendations on reliable sources for 18650 batteries -- preferably ones with undervoltage protection built in -- and chargers? Brands to look for or to avoid?