With the cover removed from the FX30E/FX60E, locate the red and black wires with a plug on the backup battery. Insert the plug into the battery connector on the bottom board.
Figure 1. Backup battery connector location
The connector is keyed so you cannot insert it incorrectly. The red (positive) connection should be the furthest from the two 30-pin option board connectors.
Note: A NiMH battery characteristic is to lose charge if not left in charge mode (trickle charge). Leaving the battery unconnected, or in the unit powered off causes the battery to fully discharge in a matter of weeks. Note that a new NiMH battery may be partially discharged. Therefore, allow at least 18 hours for a new battery to charge if it has not been in a powered unit.
The NiMH battery assembly should be replaced approximately every three years or more often if the unit is in a high temperature environment.