C&D Technologies RS-2109 Liberty MSE / Liberty DCS - Manual (Page 9)

RS02109/0814/CD 9 www.cdtechno.com
Part 5 Storage
5.1 Storage Conditions
Store batteries indoors in a cool, well ventilated, clean, dry location and place in service as soon as possible
after receiving.
5.2 Storage Temperature and Duration
The recommended temperature for storage is 50°F (10°C) to 77°F (25°C). Liberty 2V cells may be
stored at these temperatures for approximately six months; longer storage is detrimental to the cell
and can void the warranty if they are not given a freshening charge within that time period. A convenient
measurement to check the condition of the cell during storage is to measure the Open Circuit Voltage
(OCV). A fully charged Liberty 2V cell has an approximate OCV of 2.16 volts. If the Liberty 2V series
cell OCV drops more than 0.04 volts from its received voltage or measures less than 2.12 volts, a
freshening charge is required. Be sure to record dates and conditions (voltage, current and recharge
times) for all charges during storage.
Avoid exposure of a partially discharged cell to temperatures less than 0.0°F (-18°C), as this may
cause the battery electrolyte to freeze. This can permanently damage the battery and can cause potentially
hazardous leakage.
Higher than normal storage temperature (77°F [25°C] nominal) will accelerate internal self-discharge of a
cell by a factor of two for each 15°F (10°C) over nominal 77°F (25°C) storage temperature. This, in
turn, will reduce the allowable time before initial and/or boost charging.
If a freshening charge is required, it is very important that boost or freshening charges (2.35 v/c for 12
to 16 hours) be given at the appropriate time to avoid major remedial action or loss of product as noted
in Part 7.
Part 6 - Installation
6.1 Locating Battery System
Install the batteries in a clean, cool, and dry location. Avoid areas with direct sunlight and heat sources,
including electrical equipment vents or exhausts. The recommended battery room temperature of
77°F (25°C) provides the best combination of performance and life. Lower temperatures will reduce
battery performance, while higher temperatures will improve battery performance but reduce battery
service life.
Avoid sources of hot or cold air that could cause temperature variations of ±5°F (3°C) within the
battery assembly. Such variations will compromise optimum battery performance such as the float
voltages of individual cells.
For additional information on installing batteries in modular systems, refer to the Appendix for installation
details.