Voltage Converter -Charger Circuit Board Protection Module Highlights Generic Brand Charger Circuit Board Protection Module Description: The main function: Overcharge protection, Overdischarge protection, Short circuit protection, Overcurrent protection. Using high quality protection IC, MOSFET such as VISHAY, AOS, IR, etc. Low temperature coefficient FR-4 plate. With careful and precise design, comprehensive testing. Compact size, suitable for many occasions requiring high integration and low cost. Meet a variety of performance requirements to ensure battery pack safety and reliability. Application for 3.7V lithium batteries of various capacities and shapes. specification: Product: 3.7V lithium battery circuit board protection board The color green Material: PC Overcharge detection voltage: 4.250.05V Overcharge release voltage: 4.230.05V Over discharge detection voltage: 2.450.1V DC Current Upper Limit: 4A Over Current Detection Current: 5A Load Voltage: 4.2V Product Size: 30x4x2mm/1.18x0.16x0.08inch IC Components: DW01+8205A x 2 Wiring Instructions :B+: Connected to battery positive. B-: Negative of the connected battery. P+: for battery output input positive P-: For battery output, input negative Package includes: 10 Pcs 3.7V lithium battery PCB protection board Note: Some pictures light and different displays may cause the color of the item in the picture a little different from the real thing. The allowable measurement error is 1-3cm.