Note: The protection board cannot be used for lithium iron phosphate battery, xenon lamp, hand drill battery pack, can not be used for electric fish battery pack, electric bicycle battery pack, children's car battery, 775 (4A) above motor, 1W fisheye LED lamp, For the above combination of purchase customers please pay attention! . The power range described applies to the following products: Massager battery pack, LED lamp backup power supply, 12V electronics, solar street light battery pack, monitoring standby power, and other products. Note: For products discharged above 3A, the battery discharge rate should be 3C or more. Magnification formula: 1C rate battery, 2000 capacity equal to 2AH*1=2A operating current. 3C rate battery, 2000 capacity equal to 2AH*3=6A operating current. In use, the battery will heat up and the battery power is not applicable. This condition cannot be used for a long time and the battery will be damaged quickly.