The Coby MPCD451uses six C batteries.
Micro R/C helicopters require batteries. Micro R/C helicopters require double A batteries. You will need plenty of batteries. http://www.ehow.com/how_6505592_control-micro-flyer-helicopter.html
Yes, you can find them in any store that sells batteries
There are literally hundreds of different types of batteries available to consumers. The most popular batteries for consumer electronics are AA, AAA, C, D, 9 volt, and smaller "watch size" batteries.
Citroen c4
With the same load current the AA will last longer that the AAA. This is due to the physical size of the cells. A C cell will last longer that a AA and a D cell will last longer that a C cell. In dry cells as the cells get larger the amp/hours increase.
This product requires 6 C batteries if you would like to play it when electricity is not available. The batteries are not included with purchase.
C4
Milpal 4, HBD-2, C-22, C-18, Azmil 26, C4-63, C4-137, C-168, C-12:)
A "C" battery has a 1.5 Volts same with AAA, AA, and D batteries.
If that's + c3, the answer is c(c - 1)(c + 1)(c + 1)
The same as other batteries, except they are much smaller. Most watch batteries use a Silver Oxide chemistry instead of the carbon-zinc alkaline chemistry of most common AAAA, AAA, AA, C, and D batteries.