Nickel Cadmium Batteries in the Outside Plant
Document Number GR-3020
Issue Number 02
Issue Date Aug 2014
Issue 2 of GR-3020 addresses the safety and performance issues of Nickel Cadmium (NiCd) batteries intended for use as backup power
systems in a telecommunications outside plant environment.
The flooded NiCd battery is much more thermally stable than the Valve-Regulated Lead-Acid (VRLA) battery that is already widely
deployed. The NiCd battery tolerates changes in temperature and high temperatures much better than the VRLA battery. High temperatures
found in warm, sunny climates do not decrease the service life of NiCd batteries nearly as much as VRLA batteries. The failure modes of
the flooded NiCd battery should be more gradual and predictable than those of the VRLA battery, and this translates into a more
NiCd batteries have a longer service and shelf life than lead-acid batteries, and they have an inherent ruggedness that will allow
them to withstand harsh environments. NiCd batteries are made of more expensive materials than just lead, and they cost appreciably
more than VRLA batteries, but their longer lives should offset this large initial cost penalty.
GR-3020, Issue 2 includes electrical, chemical, environmental, physical design, quality and reliability, documentation, and testing
requirements, and information on auxiliary charging devices. It provides:
- Safety documentation requirements and language to align with the Global Harmonized Standard (GHS) formats and regulations.
- Additional battery safety documentation, which will assist end users with fire-fighting measures and chemical safety issues and
- Requirements requesting definitive information on battery electrolyte properties at mixtures and concentrations specific to the
batteries under review.
- Revised references to Telcordia documents that were published after GR-3020-CORE, Issue 1 (e.g., GR-63-CORE, Issue 4).
The target audience for GR-3020 includes telecommunications service providers (power engineers, battery installers, and battery
maintenance personnel), original equipment manufacturers (power system designers), battery manufacturers, and telecommunications power
Components of this product are:
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