Battery power supplies require adequate ventilation for all operations, or the battery box should be designed to:

Eliminate all sparking devices
Ventilate during charging operations
Provide inert gas purge and pressurization methods, and
Provide adequate pressure relief

Give consideration to other power supply methods.
Organizational operating procedures and staffing should as necessary ensure that all equipment designs and work procedures are reviewed by an independent engineer. When hydrogen equipment and procedures are modified, the changes should be reviewed.
Safety manuals should be revised to incorporate information on storage battery handling and operations safety practices. Safety expertise should be made convenient. Provide adequate training.