Super little charger! I have a car I only drive during the spring and summer months. Fall and winter this charger keeps the battery in top shape..without worrying about overcharging! I bolted it down, near the battery. It just stays in the car! The charger has two colored LED's to let you know if it's charging or in "Float Mode", where it maintains a full charge. Shuts itself off when full charge is reached. Bottom line: It does exactly what it say's it does! Excellent product!