High Efficiency Charging: Delivers a stable 5V supply, promoting swift and efficient charging for lithium-ion batteries. Inbuilt Safety Measures: Features multiple protection mechanisms, including over discharge protection,overcurrent protection,ensuring safety and longevity of your battery. Application Versatility: Ideal for DIY battery projects in mobile devices, solar power systems, and portable electronics, providing a reliable power management solution. 20 pieces of the TP4056 charging board module, offering great value for makers and hobbyists. Interface:TYPE-C Voltage:5V Charging cut-off voltage:4.2V 1% High charging current:1000mA Battery over discharge protection voltage:2.5V Battery overcurrent protection current:3A Board size:2.8x1.7CM Due to different batches, there may be differences in product printed text, which will not affect use. Colour:Blue Material:PCB Package Contents: 20 * charging board module Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.