... of 90 minutes.Function knowldege 1. Recycle Charger contains independent charging system, can be charge one, two, three or four ... , within 5 seconds scan, system automatically continue second 90 minutes charging, this auto scan boosting system is design to charge batteries ... 10v, thus, second boost charging is required. 3. When charging is in process, rejuvenate auto scan system set to activate 10 ...