3.7V Liter 9V 5V Multimeter Modified 18650 Lithium Battery Charge Boost Discharge Integrated Adjustable Module 2A

New and high quality Size:2.3*1.8cm Package Included:1pc up to 1 a programmable linear charging current for a single 3.7V lithium battery, fully charged with 4.2V constant current / constant voltage charging, with over temperature protection soft start to limit surge current, with battery reverse connection protection low power standby, extended battery life charging status dual output, no battery and fault status display 0V activation and 2.9v trickle charging working temperature: - 40 to 80 Celsius input voltage range: 4.2V to 6.5V output voltage: 4.2v-28v (adjustable) maximum power: 5W Description of charging indicator The module can roughly judge the working state through the two LEDs and states. CHRG It is red and stdby is blue. The red light of battery charging status is highlighted, and the blue light It doesn't light up, but the red light is slightly bright. If there is a boost output According to the different output power, it is possible that the red light will be highlighted when charging, but it is not connected When there is no load, the blue light is on and the red light is slightly on. Note: 1. Due to manual measurement, please allow an error of 1-3mm. 2. As different computers display different colors, thank you for your understanding, the actual product color may be slightly different from the image. The merchant warrants that their products comply with all applicable laws, and are offered only if they comply with Joom's policies and EU Product Safety and Compliance laws.