Car battery voltmeter for e-scooter with digital display1、Rapid Readings & Precise Results: Experience swift and accurate voltage readings to assess the condition of your 12V batteries. Know instantly if your battery needs attention or is ready to roll. 2、Simplicity at a Glance: Our battery tester features a 3-digit digital display, ensuring battery status is effortlessly understood. No more complicated jargon, just straightforward results. 3、Audible Alert: Receive audible warnings for critical situations like a dead battery or incorrect positive and negative terminal connections. Stay alert and avoid potential mishaps. 4、Reverse Connection & Overvoltage Protection: Safeguard against accidental reverse polarity connections and protect against overvoltages to keep both you and your vehicle safe. 5、Universally Compatible: This digital battery tester is perfect for testing 12V batteries across a range of vehicles including e-scooters, automobiles, motorcycles, and even boats.