Origins aside (and I have some sympathy for the precriptivist argument), it's considered acceptable these days* to call a cell a battery.. but it's never acceptable to call a multi-cell battery a "cell".
He or she said it was _not_ a cell. That is saying that it consists of more than one cell. So, certainly not a lithium CR2032 'battery', which is a single button cell.
- the rot seems to have set in earlier than the 60s and 70s-- my 1949 edition of the "Standard Handbook for Electrical Engineers" says, somewhat snarkily, "In accordance with common usage the term is also applied to a single cell". Common usage usually wins out in the long run-- there are more commoners than nobility, after all.