TECMATE Optimate Permanent Power Lead with Battery/Charge Status 20″ O-124

Permanent power sport battery lead with integrated battery status / charge system monitor for 12V lead-acid batteries, 2 automatic Modes Battery charge level monitor (single LED blink mode) Charging system test (arrow mode), 4 LEDs cover full to empty voltage range of all 12V batteries, including higher voltage AGM for power sport (4th vv LED = 12.7V ), Battery charge level : LED matching charge level blinks every 5 seconds (long term draw less than 0.2mA), Vehicle Charge system : LED arrow mode activates when charge voltage reaches minimum 13.5V (v green LED) or ideal range of 14V+ (vv green LED), SAE charge port with weatherproof sealing cap