DROK Mini DC Volts Converter Voltage Step Up 3V to 5V Cell Phone Mobile Regulator Power Supply Module Properties: non-isolated BOOST module PCB dimensions: 14.1 x 18.8 x 5.5 mm Input voltage :DC 1-5V Output voltage:DC 5.1-5 .2 V Output Current: Rated 1A-1.5A (single lithium input)