Adorama offers the Sony Cycle Energy NiMH Rechargeable 2000mAh AA Battery 4-Pack, model no. NHAAB4KN, for $7.99 with free shipping. That’s the lowest total price we could find by $2, although it was $1 less nearly a month ago (since expired). These batteries purportedly retain 75% of their charge for up to a year.

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