Amazon offers the Panasonic eneloop AAA Rechargeable Batteries 8-Pack, model no. BK-4MCCA8BA, for $15.96 with free shipping. (Non-members can spend $35 or more to bag free shipping; otherwise it adds $10.51.) That's $2 per battery and the lowest total price we could find by $8, although they were $3 less about a month ago.