Features: Main IC using original "precision" imported components. With over-charge, over-discharge, short circuit, over-current protection function, for different shapes of 3,n lithium batteries. Stable performance. Fine workmanship and durable. It can meet the performance requirements of many aspects to ensure the absolute safety of the battery group. It is suitable for many requirements of high integration, low-cost bargains. Specification: Dimension: 28*3mm (Approx.) Over Charge Release Voltage: 4.275 ± 0.025V Over Charge Voltage Range: 4.075 ± 0.025V Over Discharge Voltage Range: 2.5 ± 0.1V Over Current Detection Range: 2.8 ± 0.3A Main Function: Over Charge Protection, Over Discharge Protection, Short Circuit Protection, Over Current Protection Function. Connection Description:B+ connect to battery +B-connect to battery-P+ for battery output input +P-for battery output input-Package Contents:10*Protective BoardNotes:1, The actual colors of the item may be slightly different from the pictures shown on website caused by many factors such as brightness of your monitor and light brightness.2, Please allow slight manual measurement deviation for the data.