Motorola RS507 Quick Reference Manual page 22

22
The gold plated battery contacts do not tarnish or oxidize. No maintenance should
be needed. If the contacts need to be cleaned:
Wet the tip of a cotton swab with isopropyl alcohol and squeeze the excess
1.
alcohol from the swab.
Wipe the metal contacts with the damp swab.
2.
RS507 Hands-Free Imager