DealYard via Rakuten offers the Duracell AAA 800mAh Pre-Charged Rechargeable Batteries 18-Pack, model no. DX24B6TB, for $30. Apply coupon code "VISACHECKOUTPROMO" and checkout with Visa Checkout to cut it to $20. With free shipping, that's $1.11 per battery, tied with our mention from last fall, and the lowest per battery price we've seen. (It's also a current low by $11.) These pre-charged 800mAh AAA batteries purportedly retain power for up to 365 days while not in use. Deal ends March 17.