The V-410 is a fully automatic 1 amp digital charger. It also serves as a battery maintainer. After the charger brings the battery to a full charge, it automatically switches to a float mode. The battery is held at a full charge until you're ready to use it. Connect this Universal 12V automatic charger and be assured that your battery will be ready to go when you are. Fully automatic 3-stage charging. 1 Amp 12V output. Digital operation-no heavy transformer. Will NOT overcharge the battery. When full, maintains the battery charge. Colored LEDs indicate charge mode.