DC-DC USB Step-up Boost Module 0.9-5V to 5Vdc-600mA

From the shop's description

DC-DC USB Step-up Boost Module 0.9-5V to 5Vdc-600mA Input voltage: 0.9-5V DC Mini PFM Control Output voltage: 5V DC Output Current: 500-600mA High conversion efficiency, maximum to 96% Applications: DIY a mobile power supply, only need one battery, you can output 5V voltage for your phone, MP3, MP4, charger, very easy. In order to power your electronic devices when your device needs 5V power supply, when you only have lithium battery, this module can be directly step-up to 5V, solve your problems. Package Includes: 1 x DC-DC USB Step-up Power Boost Module Related Products: DC-DC | AC-DC CONVERTERS