Garrett Metal Detectors Infinium LS - Manual (Page 29)

BATTERY REPLACEMENT
Figure 18 Figure 17
To access the battery pack, unscrew the battery
cap at the rear of the detector housing by hand; DO
NOT use tools. The o-ring should remain in the con-
trol housing while the battery pack slides out. When
installing batteries ensure that they are aligned with
the correct polarity (plus and minus) markings. Re-
install the battery pack by placing the contact end
of the housing inside first and pointing downwards.
(Figure 17.) Verify that the o-ring is well-lubricated
and free from debris. Add a little silicon grease or
petroleum jelly if necessary. Re-install the battery cap,
hand tightening it until it is flush with the housing and
the two index marks are aligned as shown. DO NOT
over rotate. (Figure 18.)