Grab some Eneloop Pro rechargables. Just make certain you purchase them from a reputable source if you order online!
or check your Costco, some carry the Eneloop with spacers to make the AA's into a 'C' or 'D' if you find yourself in an 'emergency' without a C or D cell. (was invaluable when my kids were younger and would receive electronic toys that required C's and I didn't have time/chance to grab a set from Costco)
(yeah, I like shopping at Costco...)