The-City via eBay offers the Ultra N-RGY AAA Alkaline Battery 100-Pack for $17.99 with free shipping. That's $0.18 per battery, tied with last week's mention, and the lowest total price we could find by $2.

Of note, TigerDirect via eBay offers the Ultra N-RGY AA Alkaline Battery 100-Pack for $19.99 with free shipping. That's $0.20 per battery and the lowest total price we could find for this quantity by $12, although we saw them for $2 less two weeks ago.