Features: General 18W Battery Monitor with QC3.0/QC2.0 USB & Type C ports accurately tracks capacity for ternary lithium, LiFePO4, and Acid batteries (DC8 30V), ensuring real time electric monitoring and fast charging up to 18W. Features power off memory, customizable electric settings, and ±1% detection accuracy; compact 58.5mm x 36.5mm design integrates seamlessly into dashboards with easy front/rear button controls. Ideal for owners, solar car enthusiasts, and DIYers needing stable battery health insights and efficient charging for devices during commutes or outdoor adventures. Perfect for monitoring battery position in electric vehicles, solar powered systems, or during extended trips, offering 500ms rates for fast electric updates. The backlit LCD screen displays clear charges levels across multiple battery types, while its hard ABS construction ensures durability in diverse environments. Specifications: Component : abs Size: about 61mmx40mmx22mm/2.4x1.6x1inch electric detection ranges: DC8-30V Working current: <15mA (without charging function) Display mode: LCD screen Package Includes: 1 set Battery Capacity Tester note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.