Amazon offers Prime members the Panasonic eneloop Pro AA NiMH 2,500mAh Battery 8-Pack, model no. BK-3HCCA8BA, for $27.90 with free shipping. (Non-Prime members can spend $35 or more to qualify for free shipping; otherwise, shipping adds $6.39.) That's $1 under last month's mention and the lowest total price we've seen. (It's a current best by $10.)