install the two #393 watch batteries
unscrew the battery housing end caps from both ends of the battery
housing. Place the two batteries into each end of the battery housing
and make sure the batteries are placed into the housing with the negative
(-) side inward. The negative end is the smaller button end of the
battery. The positive (+) end is the larger end. The positive, larger
end faces outward. Screw the two battery end caps back onto the battery
housing and fully tighten snugly both end caps onto the batteries.
The battery end caps must make contact to the batteries.
Nic - Webb City, MO