Conceptual schematics should probably be as correct as possible, though.
I am indeed cofounder of electric imp, yes, so we’ve been shipping the same hardware as P0 (well, closer to P1) since 2012 - well over 100k commercial imp devices use the 2xAA psu I linked to - but it’s equally applicable to the Photon hence why I posted it, and why I help out with questions here, on the WICED forums and on our own ones (that and as a BBS addict from the 80’s, I love forums 
).