In the context of the input sentence, determine the relationship between 'battery industry' and 'battery'.
Options: product/material produced, distribution format, currency, business division

I think one of the more puzzling facts in our industry over the last, which has become more transparent that last week or so has been a view of very, very soft demand from most people supply in the battery industry allied with a couple of big battery producers talking incredibly bullishly about what Q3 is going to look like for them.
product/material produced