With our automatic plug-in chargers, you can charge 6, 8, and 12 V lead-acid batteries in a controlled manner. Once the charging voltage is reached, the electronic regulation automatically reduces the charging current. This allows the chargers to remain connected to the battery for an unlimited time. They are ideal for charging or maintaining lead-acid batteries for cars, motorhomes, motorcycles, and boats, especially when the batteries need to be kept fresh over a longer period. Our tip: Use these plug-in chargers to charge your model-making lead-acid batteries as well. Comes with practical battery connection clamps. I-U charging method.