Features :Charge and discharge status indicationBuilt-in charge and discharge power MOSInput voltage: 3.7V~5.5VCharging current: Z 1AOutput current: Z is 1AOutput voltage: 5VBAT discharge termination voltage: 2.9VPreset 4.2V charge voltage with ±1% accuracyDischarge efficiency: 85% (input 3.7V, output 5V/1A)Z large 8uA standby currentIntegrated charge management and discharge managementIntelligent temperature control and over-temperature protectionIntegrated output overvoltage protection, short circuit protection, overload protectionIntegrated over-charge and over-discharge protectionSupports trickle mode and zero voltage chargingPacking Included:1 pc x 5V Boost Step Up Power Module