||Network Operators and Service Providers using Valve Regulated Lead Acid (VRLA) batteries should perform annual maintenance by performing a discharge test or by using an ohmic test instrument.
||Cable; Internet/Data; Satellite; Wireless; Wireline
||Service Provider; Network Operator
||The aging properties of these batteries can lead to thermal runaway that may cause a fire. See GR-4228, VRLA Battery String Certification Levels Based on Requirements for Safety and Performance and http://telecom-info.telcordia.com/site-cgi/ido/docs2.pl?ID=170086171&page=home