ITEM NAME:2pcs Mini DC 3V to 5V 2A USB Output Step-up Charging Module Battery Convert S5T1 2pcs Mini DC 3V to 5V 2A USB Output Step-up Charging Module Battery Convert S5T1 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 Size:3V to 5V 2A Type: Non-isolated step-up module(BOOST) Input Voltage: 2.6-5.5V Output Voltage: 5V Input Current: 0-3A Output Current: 0-2A Working Temperature: Industrial (-40 degree to +85 degree) Working Frequency: 1.2MHz Conversion Efficiency: Up to 93% (Related to input, output voltage, current, dropout voltage ) Over Current Protection: YES Over Temperature Protection: YES (Over-temperature automatic shutdown output) Input Reverse Connection Protection: NO (If need, please add diode) Battery Indicator: 3.6V RED LED lights up. Identify Resistance: tablet PC, ipad, iphone Connection Mode: Welding, V-IN input, USB ouput This module is applied to single lithium battery 5V-12V output, suitable for digital products charging, such as phone, ipad, mp3, psp and so on. Self-installed electric circuit and battery indicator circuit, once connecting with the battery, it will be a large current output mobile power supply. It can also be set rated output voltage, as a mobile DIY power supply for 5-12V device charging. Mini size, easy to install to all sorts of small equipment. Material:plastic Colour: blue Size:20*20*6.8mm Package Contents: 2x Output Step Up Module Note: Light shooting and different displays may cause the color of the item in the .Stable 5V 2A USB female interface output, wide usage, high conversion efficiency up to 93%. Size:3V to 5V 2A. Type: Non-isolated step-up module(BOOST). With battery indicator: Less than 3.6V, red LED lights up.