I gave up on rechargables years ago; I could never find a brand that would hold up for any reasonable amount of time. So...it was back to the regular Duracells and Energizers. Generally, either can be found on sale at the local London Drugs for $14.99 - $16.99 for a 20-pack of AA. Button cells (for the F2A/F2AS) are another matter: prices can be all over the map; and they do take some searching to find...