Duracell is a brand of batteries manufactured by Procter & Gamble. Duracell manufactures alkaline batteries in many common sizes, such as AAA, AA, C, D, and 9V. Lesser used sizes such as AAAA (primarily for pagers, penlights, and blood glucose meters) and J size batteries (for hospital devices) are also manufactured along with a range of "button" batteries using zinc-air, silver-oxide and lithium chemistries, used in calculators, watches, hearing aids, and other small (mostly medical related) devices. Duracell entered into a brand licensing agreement with flash memory manufacturer Dane-Elec in 2008 for a line of products including memory cards, hard drives and USB flash drives with the Duracell brand mark and in the brand's trademark "copper top" coloring. read more