FujiFilm ALPHA 5 RYT-SX, User Manual

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CHAPTER 11 ABSOLUTE POSITION SYSTEM
11-10
Calculation of Battery Life
11
11.6 Calculation of Battery Life
The battery life elapses if the control power of the servo amplifier is left turned off for 35,000 hours.
During actual operation, the power-on and shutoff cycles are repeated. An example of calculation of
the service life in this case is shown as a reference. Note that the value is merely a calculated value
and it is not guaranteed. Note, too, that the service life becomes shorter under some ambient
environmental conditions.
Operation condition
Operation No operation
1 day 10 hours 14 hours
1 year* About 261 days (= 365 days x 5 / 7) About 104 days (= 365 days x 2 / 7)
* Assumption: operation on Monday through Friday, no operation on Saturday and Sunday
Current consumption
Current consumption in power-on phase: 0.0075 [mA]
Current consumption in shutoff phase: 0.0415 [mA] (= 0.0075 [mA] + 0.034 [mA])
Calculation of service life
Annual battery capacity consumption
(10 [Hr] × 0.0075 [mA] + 14 [Hr] × 0.0415 [mA]) × 261 [days] + 24 [Hr] × 0.0415 [mA]
× 104 [days] = 275 [mAh]
Annual battery life estimation
1600 [mAh] / 275 [mAh/year] = 5.8 [years]
Hence the service life of the battery is about 5.8 years* under the above operation conditions.
* However, the battery manufacturer recommends to stop using the battery after three years of
operation. Periodic replacement within three years is recommended without relations to the
operation conditions.