DIN EN 60896-21:2004-12

This part of IEC 60896 apllies to all stationary lead-acid cells and monobloc batteries of the valve regulated type for float charge applications, (i.e. permanently connected to a load and to a d.c. power supply), in a static location (i.e. not generally intended to be moved from place to place) and incorporated into stationary equipment or installed in battery rooms for use in telecom, uninterruptible power suply (UPS), utility, switching, emergency power or similar appplications.