Duracell DX2400R4 Pre-Charged Rechargeable NiMH AAA Batteries (4-Pack) for $7.97 shipped after clipping this coupon for $1.50 off and selecting Subscribe & Save to take an additional 15% off and receive free shipping. Here is a screenshot for your reference. You can cancel Subscribe & Save easily with a few quick clicks with no obligations after your order ships. These batteries retain power for up to 365 days when not in use and can be recharged hundreds of times. Most places have the rechargeable batteries for about $13.