SparkFun PowerEver

Lambda Nu PowerEver is a tiny PCB that turns any commercial USB power bank into a non-stop power supply while minimizing self-drained current. It is user-adjustable and is compatible with nearly all power banks in the market. The PowerEver enables the power bank to never run short of mobile power for most portable USB-powered devices.

The Lambda Nu PowerEver is designed to consume as little current as possible while passing most of it to the connected device. This current is freely adjustable using a single push button on the backside of the PCB to increase or decrease the draw to suit the power bank's design.

Features:

• Use commercial USB mobile phone power banks as a regular 5VDC power supply for powering consumer electronics or Single Board Computers (SBC)
• User-adjustable current draw to suit almost any power bank
• Designed to consume as little current as possible
• Extremely compact form factor
• Fully open-source with complete schematics and source code provided for immediate tweaking
• Eliminates the possibility of power surges and AC adapter noise