The special thing about the NiteCore Intellicharger i4 is the wide range of battery types it supports. The usual AA (Mignon R6) and AAA (Micro HR03) batteries with 1.2V can be used as nickel metal hydride (Ni-MH) and Nickel-Cadmium (Ni-Cd) are self-evident. Add to this high performance rechargeable batteries that are charged up to 4.2V.
When design the following types are supported:
Li-Ion 26650,22650,18650,17670,18490,17500,17335,16340,14500.
The Li-Ion batteries are very powerful and built into devices such as LED flashlights, flash units, digital cameras or the like. The numbers stand for example: 18650 = 18mm diameter, 65mm high and "0" the design "round".
The "I" -Tüpfelchen supplied is the 12V car charger. So one is to charge the battery even when traveling in the location. The euro connector is world-power-compatible. With 230V / 110V you need only think of the matching wall adapter.
From me a very clear recommendation!