The NC2200 charger is a compact charger for up to 4 rechargeable NiMH/NiCd batteries in AA or AAA sizes. With four independent slots, the batteries can be charged to different levels depending on their capacity. And to further increase convenience, the VA display shows the most important data such as the charging current, the battery capacity as well as the internal resistance and voltage. The timer on the display also makes it clear how long the charging process will take. However, if that's not enough, the SkyCharger smartphone app and Bluetooth dongle allow you to call up a charging graph and update the device's firmware in addition to all the information mentioned.Features:4 independent charging slots. VA display Internal resistance measurement. Robust technology in pocket size. Extended safety functions SK100181.