Waterproof IP 65; working temperature: 0ºC to 40ºC (32ºF to 104ºF)Automatically charge & maintain at proper storage voltage without damaging the battery.Ideal for charging 6V/12V AGM (Absorption Glass Mat), GEL, SLA(Sealde Lead Acid), Flooded (WET), MF(Maintenance-Free), EFB(Enhanced Flooded Battery), VRLA (Valve Regulated Lead Acid), Calcium type deep cycle automotive or marine battery with the power capability of 2Ah-120Ah, such as cars, motorcycles, lawn mowers, trucks，boats, RV, SUV, ATV, etc. Intelligent 8 Charging Steps AUTOXEL battery charger detects the voltage of the battery and decides whether to use 6V or 12V to charge. When the battery is fully charged, it will automatically minimizes the current and turn itself to a battery maintainer. Diagnosis - Diagnoses for detecting reverse polarity, low-voltage or damaged batteries before the charging.Recovery - Applies a high-voltage pulse charge when low-voltage, sulfation or lost capacity is detected.Soft Start - Test if the battery can accept charge and prevent charging with a defective battery.Bulk 1 & Bulk 2 - Charging with maximum current until approximately battery capacity.Absorption & Trickle - Charges with declining and pulsing current to maximize up to 100% battery capacity.Maintenance - Pulse charging increases battery life and gives superb performance and allows for the recovery of slightly sulfated Flooded, GEL, and maintenance-free batteries. Intelligent MCU Controller Intelligent MCU controller monitors the voltage level of the battery from the moment it is connected, using this ever-changing data to improve the charging system's multi-stage charging cycle, resulting in quicker charge times and a lessened chance of damage due to overcharging. Reverse Polarity Protection The car battery will check for the correct connection before giving power. Make sure that the red clamp (red eyelet connector terminal) connect with the positive polarity of the battery and the black clamp (black eyelet connector terminal) with the negative polarity. Easy Mounting Design There are 4 mounting hole on the battery charger maintainer, you can easily fix the battery charger by screws on the wall or hang it while charging. Automatic Charging With intelligent detect system, the battery charger and maintainer will automatically detect the voltage, select the charging mode and automatically start maintaining the battery after being full charged.