The SparkFun Battery Babysitter is an all-in-one single-cell Lithium Polymer (LiPo) battery manager. It’s half battery charger, half battery monitor, and all you’ll ever need to keep your battery-powered project running safely and extensively.

The XBee USB Adapter V2 is an update version from DFRobot. It features an Atmega8U2 programmed as a USB-to-serial converter, the same chip found on the Arduino Uno. The Atmega8U2 firmware uses the standard USB COM drivers, and no external driver is needed. However, on Windows, a .inf file is required. It's compatible with all the products using XBee socket. It provides a faster and stable wireless communication for your projects.

Say goodbye to messy cables and clueless pluging/unpluging! This Sensor Shield is a powerful expansion shield for Arduino Mega Due. It is large enough to carry up to 3 Xbee slots, 1 microSD slot and shield headers for most Arduino shields on the market. Besides, we also added a prototyping area for convenience and adaptability for customized projects.

The microSD will be great if you are planning on doing sensor monitoring for research and data gathering for your algorithms, increase your automatic systems performance with accumulated data.

This is probably the smallest Arduino controller speically designed for controlling servos. It features a 12 standard servo control capbility with an Xbee socket which can be used in model helicopters or UAVs via the Xbee link. The feather weight (7.5g) makes it an ideal controller for application with a limited payload. The built in regulator allows the input voltage to vary from 3.5-8V which fits most power supplies without any modification.