For any people interested, they were purchased at COSTCO wholesale. (Not sure if this is a U.S or Canadian only chain) But being Duracell I am sure you could find them in a lot of stores. I still have a whole slew of rechargeable batteries and chargers which are compatible with my solar panel charger. I believe in redundancy when it comes to any important item. These lights will simply supplement what I already have for blackouts but they were never intended to replace any item. Besides my gas generator, I have an eliminator 800 with solar panel, A couple of Gerber camp lanterns (battery operated) a bunch of Flashlights including a surefire combat light and the e2e, 4 browning black ice LED head lamps, a Coleman Lantern (naphtha) and about 6 cases of light sticks and then about 100 arctic survival candles (Canadian Army issue) so as you can see I will not be without light in a blackout. These crank lights do have use for me in that in a blackout I will use them first and save my of more valuable batteries for when they are needed. Although I can use my solar panel to recharge the batteries for a lot of my lights it does take considerable time even when rotating the sets. As a supplement to my existing lights, I still think they are worth the money.