Seiko V657 Manual - Page 13

English BATTERY CHANGE 2 Years The miniature battery which powers your watch should last approximately 2 years. However, because the battery is inserted at the factory to check the function and performance of the watch, its actual life once in your possession may be less than the specified period. When the battery expires, be sure to replace it as soon as possible to prevent any malfunction. For battery replacement, we recommend that you contact an AUTHORIZED SEIKO DEALER and request SEIKO SR920SW battery. * If the stopwatch is used for more than 60 minutes a day, the battery life may be less than 2 years. WARNING q Do not remove the battery from the watch. q If it is necessary to take out the battery, keep it out of the reach of children. If a child swallows it, consult a doctor immediately. CAUTION q Never short-circuit, heat or otherwise tamper with the battery, and never expose it to fire. The battery may burst, become very hot or catch fire. q The battery is not rechargeable. Never attempt to recharge it, as this may cause battery leakage or damage to the battery. 13