Dual USB Mobile Display Power Boost Module 5V 2.1A Charger Step UP Module Charging Circuit LCD Display

Parameter: 1>.Input charging voltage: DC 5V 2.1A 2>.Input battery voltage:DC 3.7V-4.2V Polymer Rechargeable Lithium Battery 3>.Input type:MicroUSB 4>.Output channel:2CH 5>.Output voltage:5V2.1A/5V1A 6>.Operating Temperature:-20?~85? 7>.Operating Humidity:5%~95%RH 8>.Module Size:69*26*12mm Feature: 1>.Support discharge while charging 2>.Support dual USB output 3>.Support Micro USB input type 4>.Support display screen Button Function: 1>.Keep press more than 5second to wake up or turn OFF module Notes: 1>.2.1A is the max output current.It is not a constant current power module.Its output current change by load!It can not keep output 2.1A fixed. 2>.Old and new batteries can not be mixed. 3>.The battery cannot be reversed, otherwise the module will be damaged. 4>.Please check the battery voltage first. I