The ProCube Twin Charger from hahnel charges select lithium-ion batteries for Canon & Nikon interchangeable lens and compact digital cameras via the two supplied, interchangeable contact plates. It also charges AA batteries with capacities of 700mAh or greater with a separate tray, which is also included. It's capable of fully charging 1-2 li-ion batteries in 1-3 hr, depending upon battery model, and four AAs with 2500mAh capacity in about 4 hr--and can even charge both types simultaneously. It also has an independent micro-chip regulated charge controller for each battery. The AA tray can be used to store the AA batteries when not in use. The LCD display shows the charging status of both types of batteries. The ProCube is also configured with a USB port for charging your mobile devices. Additionally, interchangeable adapter plugs for the US, Europe and the UK are included, as is a 12VDC adapter for on-the-go charging in your vehicle. The charger runs on 100-240VAC via the included power supply, enabling worldwide use.