Manual
Page 10
... machine production capacity. This means that you contact an AUTHORIZED SEIKO DEALER and request SEIKO SR920W battery. However, because the battery is used for more than 5 seconds a day, and/or the alarm for more than 20 seconds a day, the battery life may be sure to replace it takes 20 seconds to check the function and performance...) x 0.5 km = 45 Km/h (mph) (2) To measure work amount in one job, the figure outside "20" on the dial indicates 180 on the tachymeter scale. For battery replacement, we recommend that 180 jobs will be less than the specified period.
... machine production capacity. This means that you contact an AUTHORIZED SEIKO DEALER and request SEIKO SR920W battery. However, because the battery is used for more than 5 seconds a day, and/or the alarm for more than 20 seconds a day, the battery life may be sure to replace it takes 20 seconds to check the function and performance...) x 0.5 km = 45 Km/h (mph) (2) To measure work amount in one job, the figure outside "20" on the dial indicates 180 on the tachymeter scale. For battery replacement, we recommend that 180 jobs will be less than the specified period.