Welcome to our range of LR1 Clock Batteries. All the batteries listed below are of the same size and often referred to us as either MN9100 or N size clock batteries. All the LR1 batteries in our range are the long lasting alkaline 1.5V variety and we are pleased to offer GP, Varta and Duracell LR1 clock batteries which are sold both in singles whilst others come in packs of 2.