Specification: new Size: approx.18*3.6mm Over charge release voltage: 4.230.05V Over charging voltage range: 4.250.05V Over discharge voltage range: 2.540.1V Over current detection current: 1-3 A Main function: over charging protection, over discharge protection, short circuit protection, over current protection function. Feature: Main IC using original precision imported components. With over charge, over discharge, short circuit, over current protection function, for a variety of different shapes of 3.N capacity lithium batteries. Using the Japanese precision protection IC, VISHAY, AOS, IR and other high quality MOSFET, FR-4 low temperature coefficient of plate, well-designed, comprehensive test compact size. Suitable for many requirements of high integration, low cost occasions. Can meet the performance requirements of many aspects, to ensure, the absolute safety of the battery group. Low current consumption. Stable performance. Fine workmanship and durable. Connection B+ connect to battery+ B- connect to battery- P+ for battery output input+ P- for battery output input- Package included: 10x protection board with solder belt Note: Please allow 1-3mm errors due to manual measurement. Item color displayed in photos may be showing slightly different on your computer monitor since monitors are not calibrated same.