BAT43 by ST Design and production,in HongKong RichShine Technology Co., Limited Spot sales,And can pass HongKong RichShine Technology Co., Limited Purchasing。BAT43 Price reference $ 0。BAT43 - 。You can download Chinese information、Pin map、DatasheetData sheet function specification,In the information BAT43 Detailed pin diagram and function application circuit diagram voltage and usage method and tutorial