Optimate Accu waarschuwingslampje SAE aansluiting Monitor charge of any 12V lead-acid battery, directly directly through the included O-01 permanent battery lead or via an an optional BIKE / AUTO plug accessory. Bright LEDs flash LO BATT warning at 50% charge remaining (12.35 Volt or lower) for a standard 12V battery. Works on all 12V batteries. Connects directly to an industry standard SAE 2-pole connector. SAE charge port allows charging whilst remaining connected to battery lead. Length=3? / 7.5cm. Premium LED product designed by TecMate. 3-year limited warranty.