HW: Need Definitions

[HERBERT119 at DELPHI.COM]

A. What the hell is a "battery hen"? They're not too adept at
flying, I presume? Perhaps a mechanical wind-up toy?
B. Looked up "identimate" in the big fat Webster's
dictionary...no luck. What do people guess (or know)?
C. "Suss" - After hearing this in several HW songs (but never
anywhere else), I've gathered it means to "understand",
"comprehend", or maybe to "deal with", etc... Common British
slang term?

Chuck