TP4054 by TPOWER Design and production,in SEHOT CO., LIMITED Spot sales,And can pass SEHOT CO., LIMITED Purchasing。TP4054 Price reference $ 0.087436。TP4054 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information TP4054 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial