Dual Pro Eagle Series i3625 portable chargers combine the best of two technologies. Eagle Series uses the well known reliability of a transformer and the latest in microprocessor technology controlling the charger output. This combination allows quicker recharge times and eliminates the chance of over and under charge of batteries. The Dual Pro Eagle Series chargers 5 LEDs indicating battery charge level. When batteries a fully charged the Eagle Charger turns off completely. Should the batteries discharge to a programmed voltage level the Eagle Charger automatically reactivates the charge circuit and bring the batteries back to 100% charge. Eagle Chargers use a proprietary method of adjusting charge algorithm to compensate for temperature thus improving battery charge quality and safety.