I was very disappointed with this purchase. Seiko messed up when they put their good watch mechanism into a cheap casing that doesn't work. The battery keeps falling out of mine, so it's totally unreliable.
By Amazon Customer on April 19, 2016
question not clear, On back, inside battery compartment, there is a diagram of a battery, shows positive end on left. Uses 1 AA battery, push firmly into place. if installed properly battery should make clock work.
By Mary Castle on June 17, 2016