12V to 14.8V Automatic Lead Acid Battery Charger/Maintainer, 1.2A Trickle Charger for car, Truck, Boat, Motorcycle, RV, Lawn Tractor TRICKLE CHARGER ----- It can charge all types of 12V lead-acid batteries, including flooded or sealed maintenance free batteries (AGM & gel cell). It's the best smart charger for car, truck, boat, motorcycle, RV, lawn tractor, or any other vehicle with a 12-volt battery. FULLY AUTOMATIC ----- No need of any manual operation, just plug and leave it for charging and maintaining your batteries automatically for long time. The microprocessor controlled program will monitor the whole charging progress and automatically stop when the battery is fully charged. Then it will monitor the battery voltage and maintain the battery with a float charging current. MICRO-PROCESSOR CONTROLLED PROGRAM ----- No worry about overcharge, short circuit and reverse polarity. Spark-free technology applied. Safer floating charger with maximum voltage up to 14.8 volts. EASY OPERATION ----- Energy Saving design with one LED indicator to display different charging status. Simply hook up the charger to the battery, plug it in and walk away. Note: be care of the clip positive and negative electrode (Red = positive, Black = negative) ORION MOTOR TECH offer 5 Years Warranty and full money back guarantee. If you are not satisfied with this product or if you have any question, please feel free to contact us. We would like to issue full refund if finally we could not resolve your problem or you are not satisfied with the result. 1.Go to your amazon account and find the order. 2.Click the seller name (Sold by xxx), then you will enter the store page. 3.Click the yellow button "Ask a question" on top right.