The Nitecore i2 Charger is one of the best investments you can buy. In addition to being able to charge 18650, 18500, 18350, and 26660 batteries, it can also be used for rechargeable AAA. AA. D, and C batteries. It will charge almost any rechargeable cylindrical battery on the market! With its powerful 1 Amp output, your batteries will charge faster than ever.