1.Wide Input Voltage Range: Our lithium battery charger module is compatible with a wide range of input voltages from 4.5V to 5V, making it versatile and adaptable to a variety of different power sources. 2.High Charging Current: The battery charging board can charge at a maximum current of 1000mA, meaning your batteries will charge quickly and efficiently. 3. Over-Discharge Protection: With over-discharge protection at 2.5V/3A, this battery charging module protects your batteries from damage due to over-discharging. 4.Compact Size: The small size of the board, measuring only 28x17mm, makes this mini battery charger board easy to install and use in a range of different settings. 5.Multiple Protection Features: This portable battery charger panel features both charging and over-discharge protection, preventing damage to your batteries from over-charging or over-discharging. Additionally, the module automatically controls the charging current, providing optimal protection to your batteries while charging. Interface: TYPE-C Voltage: 5V Charging cut-off voltage: 4.2V ±1% Charging current: 1000mA Battery over-discharge protection voltage: 2.5V Battery overcurrent protection current: 3A Charging current: 1000mA Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Specification:20Pcs Colour:As Shown Material:PCB Package Contents: 20 x Lithium Battery Charger Module