Note: The lithium battery protection board cannot be used for lithium iron phosphate batteries, high intensity discharge lamps, hand drill battery packs, electric fish machine battery packs, electric bicycle battery packs, children's car batteries, 550 or more power motors, 1W fisheye LED lights, customers who purchase the above combinations please pay attention! The power range described is applicable to the following products: Massager battery packs, LED light backup power supplies, 12V electronic products, solar street light battery packs, monitoring backup power supplies, and other products. Note: For products with a discharge current of more than 3A, the battery discharge rate must be more than 3C. Ratio calculation formula: 1C rate battery, 2000 capacity equals 2AH*1=2A working current. 3C rate battery, 2000 capacity equals 2AH*3=6A working current. If the battery heats up during use, the battery rate is . In this case, it cannot be used for a long time and the battery will be damaged quickly. Due to different batches, there may be differences in product appearance, color, and printed text, which will not affect the use. Material: PCB colour: Green Package Contents: 2 x Protection Board Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.