Nitecore has pulled out all the stops with their newly improved i2 Intellicharger. This 2016 version has a 100% charging acceleration with up a 1000 mA charging current in a single slot, your batteries will charge faster than ever and automatic current selection means the charger adapts to your battery's needs. With the new current active distribution technology, the i2 will adapt to the needs of your batteries. This new version also has expanded compatibility, now supporting 3.7V and 4.35V batteries. These features combined with a temperature controlling design and high quality materials make this charger a step above the rest!