Doc Johnson Alkaline AA Batteries 4 Pack. Do not let the power fade just at that critical moment! Keep a supply of Doc Johnsons powerful AA batteries on hand. These long lasting 1.5 volt energy sources come 4 to a pack. For a wide range of accessories. Features: replace all batteries at the same time. Do not use new batteries with old ones. Do not carry loose batteries in your pocket or purse. Remove batteries when not used for long periods of time.