Features 1、Double Ports Convenience: Featuring USB and Type C ports, the battery capacity voltage meter offers the ability to measure battery voltage and residual power while concurrently charging other devices. This multifunctional feature serves both efficiency and convenience. 2、Broad Compatibility: Catering to a wide range of needs, the digital battery monitor supports voltage and residual power measurement for lithium batteries, and Iron Lithium batteries within a DC 8‑30V working voltage range. 3、Power Outage Memory: Embedded with a power outage memory function, battery capacity indicator retains its settings even after power interruption. Once the appropriate mode is set, there's no need for reconfiguration in subsequent usage, making it user friendly and convenient. 4、Anti Reverse Polarity Guard and Low Voltage Alert: Equipped with anti reverse polarity guard, the battery capacity percentage tester safeguards against incorrect connections. An additional low voltage alert feature causes the screen to flicker when the measured voltage is low. 5、Versatile Application: The battery monitor is not only suitable for use in golf carts, cars, RVs, motorcycles, boats, and various other settings for measuring battery voltage and remaining capacity, but also practical for testing battery capacity and voltage in high and low voltage switchboards, display cabinets, photovoltaic inverters, and DIY electronic projects. Specification Item Type: Digital Battery Meter Material: PC Operating Current: < 15mA (Without Charging Function) Display: LCD Screen Display Color: Blue USB Output: QC2.0, QC3.0, maximum output 18W (5V-3.4A, 9V-2A, 12V-1.5A) Type C Output: QC2.0, QC3.0, maximum output 18W (5V-3.1A, 7V-2.4A, 9V-2A, 12V-1.5A) Power Failure Memory: After setting the parameters in the power failure memory, you don't need to reset the parameters when powering off and on again. Package List 1 x Digital Battery Meter 1 x Connection Cable