A: Put on Google and find several sources
A: I believe it is just a type of battery.
A: Nobody really knows why they have that designation. An N-cell is about the same diameter as a AAA battery but about 2/3 the length. I guess it is how they name streets... no body knows why a street is different than an avenue or a road.
A: Nicad. I guess.
A: Thank you for taking the time to contact Energizer, we would be happy to assist with your inquiry. In regard to the E90 battery, the N size does not stand for anything in particular. It is just a letter size designation similar to C or D size. Please feel free to contact us at 1-800-383-7323 in the future with any additional questions or concerns.
A: Thank you for taking the time to contact us in regards to our Energizer E90 N Alkaline battery, I would be happy to assist you. The physical size of this battery is 12mm in diameter and 30.2mm in height, I have provided you with the PDF spec sheet for you below as well. Please feel free to contact us at 1-800-383-7323 in the future with any additional questions or concerns. Once again thank you for taking the time to contact Energizer. http://data.energizer.com/PDFs/E90.pdf
A: Same circumference as AAA battery but !/2 the length.
A: Approx.. 1.2 long x 0.4 inches dia.3.0 x 1.2 cm.
A: Its about half the size of a double A battery
A: Maybe one inch long. Looks like a really small AAA