5V/2.1A Output UPS Power Supply DIY Charger Board Voltage Step Up - Converter Boost Module

Features: 100% brand new and high quality. This is a 10W and discharge boost module. Designed with CR LED which is status indicator. Led indicator, OK LED is fully charged OR battery failure status indicator. Widely used for battery powered equipment,lithium batteries 18650 14500, UPS power supply DIY, solar charging, MP3/MP4 players, audio/video equipment, portable devices,Bluetooth applications. Specification: Charging current: 0-1A Full voltage: 4.2V+-2% Discharge current: 0-3.5A Discharge quiescent current: 200uA Discharge conversion efficiency: 78%-91% Output current: 0-2.1A(5V) Operating ambient temperature : -40° to +85° Storage temperature: -65° to +125° Size: 28*18*6.3mm / 1.1*0.7*0.2in Weight: 3g / 0.1oz (approx.) Package list: 1 * Module Note : 1, This module without lithium battery over-discharge . 2, In order to achieve more than 5W, it is recommended to use two or more batteries in parallel.