8A smart charger and battery maintainer suitable for 12V and 24V vehicles, and recommended for START/STOP batteries. Compatible with lead acid, gel, calcium, EFB and AGM batteries. Keeps batteries in good condition without risk of overcharging. Features one button operation and a large LCD backlit display for ease of use, as well as reverse polarity and short-circuit protection for safety. Connect and be sure with the charger automatically adjusting to long-term maintenance mode when the vehicle's battery is full. Features include: 8A smart charger and battery maintainer, compatible with 12V or 24V batteries, up to 4A or 8A charge rate selection, recommended for Stop/Start vehicle batteries and traditional batteries, 7-Stage charging process adjusts to the battery type being charged, automatically adjusts to long-term maintenance mode when battery is full, large LCD display screen that clearly shows voltage and charging process, IP65 rated for use in all weather conditions, cold weather charging mode that protects batteries in cold temperatures, one button operation for ease-of-use, reverse polarity and short-circuit protection, quick connectors with clamps or O-ring terminals for long term connection. Technical Info: Voltage Output: 12V/24V DC, Voltage Input: 220-240V AC, Charge Rate: 12V up to 8A/ 24V up to 4A, Battery Type Compatibility: Lead Acid, Gel, Calcium, EFB, AGM, Max Battery Size - Charge: 12V 150Ah/ 24V 70Ah, Min Battery Size: 4Ah, Product Size (mm): 268 x 144 x 127.