Discover the ultimate tool for monitoring and optimizing your device's power usage with our USB Power Meter. This versatile device is designed to provide comprehensive insights into your battery's performance, ensuring your devices are always operating at their best. Comprehensive Testing Capability: Our USB Power Meter allows you to accurately test battery voltage, current, and discharge capacity. With a maximum range of 99999mAh, it delivers precise measurements, making it an essential tool for anyone looking to maintain their devices' health and efficiency. Communicate Functionality: Equipped with USB communication capabilities on both input and output terminals, this power meter facilitates seamless data transfer. The B+B‑D+D‑ four-line connection ensures efficient and reliable communication, making it easy to monitor and analyze your power data. Data Zeroing: Easily reset your data by holding down the button until the display changes to another data set. The USB Power Meter can store up to 10 sets of data, automatically switching to a new set for zeroing, allowing for continuous and uninterrupted monitoring. Data Viewing: Activate the data viewing mode by double-clicking the button within 0.5 seconds. The backlight LED will flash, displaying a new set of data with each button press. To exit, simply double-click the button again. The LED backlight ensures clear visibility, even in low-light conditions. Voltage Alert: Stay informed with the built-in voltage alert system that warns you of high or low voltage levels. When triggered, the backlight LED flashes, accompanied by an audible alert. Press the button to keep the LED on for 30 seconds, giving you ample time to address any voltage issues. Optimize your power management and ensure the longevity of your devices with our USB Power Meter. Whether you're a tech enthusiast, a professional, or simply someone who wants to keep their devices in top condition, this tool is an invaluable addition to your toolkit.