The output is displayed according to the current of the device, distinguishing the magnitude of the current. The output current is greater than 1A display 2A output, the output current is less than 1A display 1A output, and the input IN flash. Continuous high current output regardless of battery voltage. Synchronous rectifier switch scheme, no activation, high conversion rate, strong recognition ability, can support to 0.05A small current equipment. Protection function of anti-reverse connection and anti-series. Long press to turn on the flashlight, double-click to turn off the output. Item Name: Empty DIY Battery Case Material: ABS Battery Core Type: Liquid Lithium Ion Core (18650 Battery) Applicable Type: Universal Type Battery Type: Cylindrical Aluminum Shell Additional Function: Multiple U Port Output Power Capacity: 8 Weld-free Mobile Power Box (without Battery) Conversion Rate: 85% Main Board: Multi-channel Independent IC Management Protection Board Output: 5V 2.4A (up to 2.8A) Input: 5V 2.1A (MAX.) Battery Capacity: 2000mAh-12000MAh (Not Included) Scheme: Software + MCU Single Chip Microcomputer Features: Portable, LED Light, DIY Power Bank, Easy to Use, LCD Screen Case Size: 171mm x 80mm x 22mm/6.73" x 3.15" x 0.87" (Approx.) Notes: Without batteries and charging wires When the battery performance is poor and the voltage drops too fast to 3V, it will immediately turn to 00. Even if the battery voltage goes back after standby, the power will not rise back. Therefore, it is not recommended to use batteries with large internal resistance, long storage time and have been used for many times. Due to the light and screen setting difference, the item& 39;s color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Empty DIY Battery Case (Battery and Others Not Included )