Brand N/A Model N/A Quantity 1 Color Blue Material PCB + plastic + iron Features 5V Specification Charging voltage: 5V; Boost output: 5V; Charging current: 400~500mA; Output current: 300~400mA Application Various electronic products or DIY projects English Manual/Spec Yes Other Size: 38mm x 10mm x 4mm; Charging voltage: 5V; Charging current: 400~500mA; Output voltage: 5V; Output current: 300~400mA; Suit for the general usage; Property: Integrate a Lithium-ion battery protection board a recharge board and an voltage-transform board together; Protection: overcharge overdischarge and overcurrent protection; Recharging: recharge for single or multiple parallel connected lithium-ion battery cell; Voltage transformation: transform voltage of a single lithium-ion battery cell or multiple parallel connected lithium-ion battery cells to 5V; Usage: Weld the battery positive pole and negative pole with the voltage-transform board (B+ / B-) separately; Then give 4.8~5V voltage to the charging terminal P+ / P-; Finally measure the voltage of the voltage-transformer output terminals V+ / V-( it should be 5V) Packing List 1 x Mobile power source board