Theses Ray O Vac - AAA batteries are among the most affordable batteries out there. Tested against Duracell, they last up to 90% of the time as top brands and cost 50% less. These batteries are great to have on the side for an emergency. They don't work as well in other products such as mp3 players and digital cameras, but they hold their ground in toys, flashlights, and other low efficient products. The batteries come in the standard 4 pack, ut i highly recommend purchasing the bulk 20+ pack just for convenience.