Battery poles (6)
I believe the answer is:
anodes
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">battery poles</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is all the clue.<br/ ></span>
(Other definitions for anodes that I've seen before include "They help current entry" , "Positively charged conductors" , "Positive electrodes" , "Sea don (anag.)" , "Negative terminals of primary cells" .)