Battery parts? (5)
I believe the answer is:
tests
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">battery parts?</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for tests that I've seen before include "Examinations, trials" , "Puts to proof at cricket matches" , "Trials -- tribulations" , "Critically examines" , "Tries out" .)