Specification: Single protection board size: 28mm * 3mmWith nickel bar Size: 90mm * 3mmLinelength: 80mm Overcharge detection voltage: 4.275±0.025VOvercharge recovery voltage: 4.075±0.025VOver-discharge detection voltage: 2.50±0.1VOver-discharge recovery voltage: 2.90±0.1VOvercurrent protection current: 2.5±0.3ANormal discharge current: 2AShort circuit protection time: ≤50usNormal working consumption current: ≤6uAStandby current consumption: ≤0.6uAWorking resistance: ≤50mΩ Main functions: Overcharge protection, over-discharge protection, short circuit protection, over-current protection Features:100% Brand New and High Qualitybuilt-in high-precision voltage detection circuitovercharge protection, over-discharge protection, over-current, short circuit protectionthrough the MOS tube can control the battery charge and dischargewide operating temperature range of -40 ° C to +55 ° Clow current consumption Detailed components: 2 MOS \DW01A \Seiko 8205A DW01A  is a lithium battery protection circuit, in order to avoid lithium batteries due to overcharge, over discharge, current is too large lead to shorten the battery life or battery damage is designed. It has a high accuracy of voltage detection and time delay circuit. 8205A  has the advantage of internal integration of two identical nmos tube for lithium battery protection circuit is very convenient.Connection description:B+ connect to battery+B- connect to battery-V+ for battery output input+V- for battery output input-Package Included:10 x 3.7V 1S Battery protection board