In this instructable video, I show you how to make a device that uses a LiPo (Lithium Polymer) battery to output USB power. You can use this device for charging/running any USB devices, e.g. cell phones, MP3 players, iPhones, iPods, fans, lights, etc. This assumes you have the USB cable for your device already. This solution uses a 5 volt UBEC to convert the power from your LiPo to the right voltage used by USB.
-LiPo battery (2 cell minimum, more cells are OK)
-male and female connectors for battery
-5 Volt UBEC
-female servo lead
-USB type A female connector
-multimeter or volt-ohm meter
-soldering iron or gun (optional)
-solder and heat shrink (optional)
Purchase options: If you can't find the materials, check out some of the following.
o 2-cell 350mAh with JST female connector: http://www.hobbyking.com/hobbyking/store/__20654__ZIPPY_Flightmax_350mAh_2S_20C_USA_Warehouse_.html
o 2-cell 1000mAh with JST female connector: http://www.hobbyking.com/hobbyking/store/__16772__Zippy_Flightmax_1000mAh_2S1P_15C_USA_Warehouse_.html
-male battery connector:
o JST: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=9682
o Deans: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=11961
o XT-60: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=10414
-5 volt UBEC: http://www.hobbyking.com/hobbyking/store/__14310__HobbyKing_UBEC_3A_2_6s_LiPO.html
-Female servo lead: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=21757
-USB type A female connector: http://www.amazon.com/Extension-Cable-Type-Female-Black/dp/B00182CIB8
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