Features: Voltage: 2.8-30.0V. Current: 0-10.0A. 18350/18650/26650. Resolution: 0.1. Accuracy: ±2%. Measure: Voltage/current/capacity/the load resistance. All in one meter. Suitable for: 18350 18650 26650 lithium li-ion battery and other battery for DIY project. Function description: Measure the battery voltage. Range: 2.8~3.0V. Resolution: 0.1V. Accuracy: 2%. Measure the battery capacity. Battery capacity is the battery grid form on the LCD display, a total of five girds. Battery capacity is distinguished by the battery voltage. Displaying X0 grids stand for full capacity, X1 girds for 4/5 capacity, X2 grids for 3/5 capacity, X3 grids for 2/5 capacity, X4 grid for 1/5 capacity, X5 grid for 0/5 capacity. (default:  3.7V full capacity, 2.8V is exhausted). Can be set the full capacity 2.9v-30.0V, the exhausted 2.8V-29.9V. Measure the current: Range: 0.0~10.0A. Resolution: 0.1A. Accuracy: 2%. Measure the resistance of the current: Range: 0.0~10.0A. Resolution: 0.1A. Accuracy: 2%. Measure the resistance of the load: Range: 0~999Ω, when over 999Ω display “OL”. Resolution: when less than 10Ω, resolution is 0.01Ω. When less than 100Ω, resolution is 0.1 Ω. When less than 1000Ω, resolution is 1 Ω. Accuracy: 2%. With Backlight, default off-backlight, you can turn on/off the backlight by button. Specifications: Size: 42 x 19 x 12mm. Display size: 25 x 12mm. Note: battery: ≥2.8V. Working temperature: -10 to 40 degree. Package included: 1 x Lithium Li-ion battery tester module