Newegg offers the Fujitsu AA Alkaline Battery 4-Pack, model no. LR6(4B)FP-W-FI, for $5. This $5 mail-in rebate drops it to $0. With $2.99 for shipping, that's $10 off list and the lowest total price we could find. They purportedly hold 95% of their charge for over 10 years in storage. Deal ends April 13.