Citizen Eco-Drive E660 Instruction Manual page 75

Eco-Drive watch handling precautions
WARNING
Use Only the Specified Battery
• Never use a battery other than the rechargeable cell specified for use in this watch.
Although the watch structure is designed so that it will not operate when another type of
battery is installed, if a conventional watch battery or other type of battery is installed in
the watch and the watch is recharged, there is the risk of overcharging which may cause the
battery to rupture.
This can cause damage to the watch and injury to the wearer.
When replacing the rechargeable cell, always make sure to use the designated rechargeable
cell.
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