what is the difference between a cr and dl battery?
CR is the IEC prefix for Li-MnO2 coin cells. The number that follows indicates the diameter and thickness (so CR2032 is 20mm diameter, and 3.2mm thickness). "DL" is the prefix that Duracell uses. The only difference is that a DL cell is Duracell-branded, and a CR cell is made by someone else.