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 and 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: 2.8 x 1.7 cm Due to different batches, there may be differences in product printed text, which will not affect use. Color: Blue Material: PCB Package Contents: 20 x Charging board module Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the real thing. The measurement allowed error is +/- 1-3 cm.