Details For plug-in test boards, the 3.3V and 5V power supplies have jumper to adjust the desired power. Supports 9V battery jacks, 6.5 - 12V input power adapter, or power supply.Access via USB via Mini USB cable is small space wasted experiment board.
DC-DC 9V/12V/24V to 5V USB Step Down Power Module 2A
Charge at home on 110/240v or in the field on 12v. The B6-AC handles both! The IMAX B6-AC is a rock solid charger thats able to charge, balance and discharge Lion, LiPo, LiFe (A123), NiCd and NiMH batteries. (Clone)
Specification: Input voltage range：4～38VDC(Note:input voltage not exceeding 38V) Output voltage range：1.25-36VDC adjustable Output current: 0-5A, recommended for use in 4.5A. Output power: 75W Working temperature: -40~+85 degrees Operating frequency: 180KHz Efficiency:96%（max) Short circuit protection: yes(limit current 8A).
This is a very compact DC-DC step-down converter capable of supplying any voltage between 1.23 and 30 V from a higher voltage power supply (up to 35 V).