Very useful when you are like me, a large battery and rechargeable rechargeables.Il user accepts 3 types of batteries: Li-ion, Ni-MH and Ni-Cd automatic recognition. My choice is focused on this Nitecore i2, because I have, recently, the Li-on battery of my e-cigarette which come to be added to Ni-Cd AA, AAA existing services. Overall I give 5 stars for this article, for all he meets and proper operation. Provide an electrical cord to French standards, because it comes with is US ..