Unitronic UH009-AC5 OptiMate Battery Status Charge System Monitor
12V socket adapter with state of charge monitor that plugs directly into your 12V power port - Adapter with 24-7 battery status at a blink of an LED!
Plug fits any standard 21-22mm / 7/8" 12V cigar / power socket that remains powered / hot when ignition is off with integrated 10A fuse to protect electronics. Sealed monitor with 4 LEDs indicate battery state of charge from full to empty for 12V lead-acid (AGM GEL or STD) batteries - LED corresponding to charge level blinks every 3 seconds. SAE quick connect charge port for charging battery when needed - with weatherproof sealing cap when vehicle is moving! Displays charge system status when engine is running - easy pre-run check at a glance to see if battery is receiving charge. 3-Year Warranty