Please make sure your PLGR has a good memory battery in it before shipping it in for rekeying. Before sending a PLGR in for rekey is a good time to change the memory battery. It is a good idea to change it at least once a year.
Prices vary so check all three.
To change a memory battery and not lose your key, first make sure you have good primary batteries in the unit or that it is plugged into an outside power source. Then turn it on. The cut off date will be January 30, 1998. R01A Rockwell PLGRs can be ordered by PO, Visa card or third party draft. Accuracy in the open is on the order of 3 meters or better.