DZS Elec 2pcs Mini DC 3V to 5V 2A USB Output Step-up Charging Module Battery Converter for Mobile Mp3 Phone Charging DIY

DC 2.6-5.5V input to 5V 2A output non-isolated step up module, used as a mobile devices DIY power supply.
Stable 5V 2A USB female interface output, wide usage, high conversion efficiency up to 93%.
With over current protection, over temperature protection (Over-temperature automatic shutdown output), much safer and more reliable.
With battery indicator: Less than 3.6V, red LED lights up.
Mini size, welding connection, easy to install. The working temperature is - 40 degree to + 85 degree, can be used as a low voltage mobile device DIY power supply for long time.