What is the part number for the back up battery for the DS415i and the DS445?
The P333 Backup Battery is designed for use with both the DS445 and DS415i Photoelectric Beam Detectors. When using the P333 with the DS415i, the polarity plug in the battery connector must be removed. Pull the white plug out of the connector using a pair of needle nosed pliers before connecting it to the DS415i. When the P333 battery is used with the DS445, there are no modifications necessary.