Ending today, at 4:15 pm ET (or until 100% claimed), Amazon offers Prime members the Panasonic eneloop AAA Rechargeable Batteries 12-Pack, model no. BK-4MCCA12SA, for $18.71 with free shipping. (Non-members can spend $35 or more to qualify for free shipping; otherwise, shipping costs $6.15.) That's $3 under our mention from last month and the lowest total price we've seen. (It's also a current price low by $7.) The batteries can purportedly be recharged up to 2,100 times.