Puts out all parts required to motorize #21303 WALL-E. Never having used Power Functions before, realizes 9 AAA batteries are required (battery box: 6, remote control: 3). AAA batteries available at home: 2.
Shopping list updated...
Do you have a link to the instructions/parts list? I'd love to do this.
Below is one from a Korean AFOL showing the parts required. IR remote needed but not in pic.
Modification is pretty straightforward, athough a bit tight for the battery and wires to be squeezed into Wall-E's belly.
Nothing to do with exposing to sunlight, all brown (or reddish brown) parts are more brittle than other coloured parts, for some reason only known to TLG. They probably mixed different chemicals to produce the brown parts.
I have encountered broken pieces throughout the years and yes, all of them are brown parts.