So I found on Quora.com in the name LR6 battery that the L stands for alkaline, the R stands for round, and the 6 means it's a AA size battery. However I have another AA battery with the name R6P. In this question on this site it's said that R6P can both be zinc-carbon or manganese-zinc. Is there a meaning of the R and the P in this? Is there a place that shows what these letters mean? On this R6P battery it says "not to be substituted for alkaline (LR) batteries. Does this mean it has limited uses? For example can I use it for a wireless mouse or keyboard?
Edit: Also, both LR6 and the R6P are marked 1.5 volts. I've just opened up the R6P battery and it looks like this:
Also, I've read a bit about zinc-carbon batteries, the article at Wikipedia says that the chemical reactions is from zinc and manganese dioxide. So in the question I linked does zinc-carbon and manganese-zinc mean the same thing?
I've just looked up manganese oxide and it look exactly like what I saw as the filling around the rod. It looked like this: Manganese dioxide
So I guess the centre rod is carbon and the filling around it is manganese dioxide?