Look at this Specialized 1A Lithium Battery Plates Charger Board. It is a complex design with input and output ports. Please install the heat sink if the current is over the max value. Made of high quality material， it is durable for long-term use. This charger module fits for any lithium battery. Thanks to its adjustable character， you can manually alter the voltage according to your real demand. When it is fully charged， the light turns red. It is a good choice! Come to buy one for yourself!                                    Features            The module is in a new conditionComposed of input / output portsIt is a kind of non-isolated step-down moduleYou can manually adjust the voltageFit for any lithium battery                                                            Specifications             Module Name     lithium battery plates    <br> Charging Method     Linear Charge    <br> Charging Current     1A (adjustable)    <br> Charge Accuracy     1.5%    <br> Input Voltage     4.5V-5.5V    <br> Full Charge Voltage     4.2V    <br> Charging Indication     Red blue light charge full charge    <br> Input Interface     Mini USB    <br> Working Temperature     -10 ℃ to +85 ℃    <br> Can Reverse     You can not reverse     <br>                                                             Package Includes            1 x Charger Board<br>