Welcome to my store,I hope you have a great shopping experience here.We will keep updating a lot of new products, and there is definitely one for you. Item Name: Battery Protection Board Material: Copper Clad Laminate Voltage: 18V Nominal Capacity: 3.0Ah Features: Practical, Durable, Fine Workmanship Size: 4.6cm x 3.3cm/1.81" x 1.3" (Approx.) Specifications: The protection board has stable working performance and long service life. The item can be used many times will not broken until the battery cells dead. It has over charge protection, over discharge protection, short circuit protection, over current protection, reverse charge protection, over heat protection. Notes: Due to the light and screen setting difference, the items color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Package Includes: 1 x Battery Protection Board