Busch-easycare
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Replacing batteries
Technical manual 0073-1-8701
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34
8 Replacing
batteries
8.1 Battery
life
The uninterruptible power supply is equipped with maintenance-free, valve-
regulated lead-acid (VRLA) AGM batteries. Based on their EUROBAT classifica-
tion, these batteries have a service life of 3 - 5 years. Their usable life is highly
dependent on temperature (up to 20°C: 4 - 6 years; see Fig. 3). The capacity of
the batteries is around 60% after 3 - 5 years.
We recommend replacing the batteries every 2 years as part of regular mainte-
nance.
Fig. 3: Battery life as a function of the ambient temperature
If the system is not going to be used for some time, the batteries must be fully
charged first to prevent self-discharge causing damage to them; see Chapter 7.2,
page 33.
