Pens N' More via eBay offers the Rayovac Platinum NiMH Rechargeable Battery 4-Pack
in AA, model no. PL7154, or AAA, model no. PL7244, for $7.99
with free shipping
($2/battery). That's the lowest total price we could find for either pack by $4, although we saw these AA batteries for a buck less in August. These batteries can purportedly be charged up to 300 times. Deal ends May 18 at 5 pm ET.
Of note, add five 4-packs to your cart for an in-cart price of $31.95 with free shipping ($6.39/pack).