Page 209 - Uninterruptible Power Supplies
P. 209
Batteries
Batteries 207
Figure 7.23a
Battery Monitors
The VRLA cells are predominantly chosen for many UPS applications
due to their advantages in size, low initial cost, low maintenance, and
the attraction of being able to forego the battery room environment.
However, the VRLA cells have a relatively short life, are temperature
sensitive, and since cells are sealed it is difficult to assess the health of
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