C&D Technologies RS-1826 Liberty Series 1000 FA Battery - Manual (Page 6)

INTRODUCTION
The batteries referenced in this document are sealed lead acid batteries
referred to as FAM and FA batteries. They are constructed with an
absorbent glass-mat and are valve-regulated with pasted lead-calcium
plates. They are designed to provide long, reliable service life with
minimal maintenance. When operated at the recommended float voltage
and temperature, the batteries emit virtually no gas or acid mist and do
not require special ventilation to be operated safely other than what is
generally required by local building codes. However, VRLA batteries
should never be installed in a sealed enclosure or cabinet.
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