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that using a battery beyond its lifespan period may cause a battery heating, leakage
and/or deformation.
Table 3-1: Recommended Time between Periodic Battery Recharge vs. Storage Temperature
Replacing the Backup Battery
A battery contains diluted sulfuric acid, a toxic and corrosive substance. Avoid any
bodily contact with the leaking liquid when handling leaking batteries and affected
parts. If the battery leaks and the liquid inside touch the skin or clothing, immediately
wash it off with plenty of clean water. If the liquid splashes into eyes, immediately
flush the eyes with plenty of clean water and consult a doctor. Sulfuric acid in the
eyes may cause loss of eyesight and acid on the skin will cause burns.
Procedure 3-1 How to Replace the Lead Acid Backup Battery
To replace the Lead-Acid backup battery, follow the procedure below.
1) Disconnect the battery cable from the Battery connector of the power supply (see
Figure 3-2) and from the battery.
2) Unscrew the battery holders (two screws in the small battery and four screws in the
large battery) with the attached battery temperature sensor. (See Figure 3-3 below.)
Average Storage
Temp (°C)
25
45
60
3-17
Power Supply Module and Backup Battery
Recharge Interval
(Months)
12
4
1
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