so if you are in a battery junk yard use this way to find capacity of individual cell without having to google it.
to get a maximum mah rating battery look for a battery bank that has highest wh ratings.
an individual cell having WH rating above 9.5 means it at least is 2500mAH.
i hope somone good at andorid programing would code a little utility for this purpose ... dang i never worked with visual programing. all were console based.