The Hohm Tech SCHOOL UNO 2A USB Charger features a single charge bay, input power regulator, and is compatible with all Li-Ion Batteries. The SCHOOL Uno charger offers intelligent charging recognition and can deliver 0.5-2A charging depending on what power supply or connection is used. Able to detect the input power, the SCHOOL UNO Charger will deliver the proper power needed to efficiently charge any battery within the single bay. Ranging from 30mm-71mm, the SCHOOL UNO is compatible with all lithium ion batteries.