Crossword Genius

Physical tests run on battery by Siemens (7,7)

Ross

I believe the answer is:

assault courses

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'physical tests' is the definition.
I don't know anything about this answer so I cannot tell whether this works.

'run on battery by siemens' is the wordplay.
'run on' becomes 'course' (synonyms. I am not sure about the 'on' bit.).
'battery' becomes 'assault' (synonyms).
'by' means one lot of letters go next to another.
'siemens' becomes 'S' (synonyms).
'course' put after 'assault' is 'assaultcourse'.
'assaultcourse'+'s'='ASSAULT COURSES'

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I've seen this clue in The Times and The Sunday Times.
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