Going to start a project to mod the Hasbro Interactive R2D2 to be controlled either with an Arduino or a Raspberry Pi. The toy currently uses four "AA" batteries for the logic board and four "D" cell batteries to drive the motors. I want to replace that with a single LiPo battery.
I'm new to powering projects with batteries, but I have been doing a lot of reading. Here is what I was planning on buying:
LiPo 7.4v 5500mAh with PCB protection circuit:http://www.all-battery.com/74volt-5500mahli-polymerpackwithpcb.aspx
Switching BEC, configured with either 5v or 6v with a regulator:http://www.ebay.com/itm/380588963849?ssPageName=STRK:MEWAX:IT&_trksid=p3984.m1423.l2649
The toy itself:http://www.amazon.com/Star-Interactive-Astromech-Droid-Robot/dp/product-description/B001E95SQ2/ref=dp_proddesc_0?ie=UTF8&n=165793011&s=toys-and-games
Does this seem like what I'd need? Is it underkill, overkill, or am I missing something? Any help would be greatly appreciated. Thanks!