Backup Battery Periodic Maintenance; Backup Battery Removal; Backup Battery Re-Installation; Backup Battery Checkout - Garmin GI 275 Maintenance Manual

5.2.1

Backup Battery Periodic Maintenance

For maximum battery longevity, store within a temperature range of -4°F to 68°F (-20°C to 20°C). The
GI 275 battery should be kept partially charged when unused for longer periods of time and should not be
stored when completely discharged. Charge the battery to 30% within 1 year of receipt and recharge to
30% every 2 years thereafter if the GI 275 is not in use.
5.2.2

Backup Battery Removal

Remove the backup battery using the following procedure:
1. Remove the GI 275 in accordance with Section 5.1.1.
2. Remove the four screws securing the battery cover to the top of the GI 275 and remove it.
3. Remove the battery by pulling the battery pack straight up until it is unseated from the connector.
5.2.3

Backup Battery Re-installation

CAUTION
Prior to installation of a new battery or re-installation of the existing battery, visually
inspect the battery for physical damage, swelling, or signs of leakage or burning. If
damage is found, properly discard the battery immediately and install a new battery
(P/N 011-04528-00).
CAUTION
Use care when handling the backup battery. Installation of the battery in the GI 275
requires the two included end caps to be placed on each end of the battery. The battery
leads are conductive. Care should be taken to ensure the battery contacts do not touch
surfaces that would result in arching and potentially damage to the cells. The installer
must use care when handling and storing the backup battery. Do not install batteries that
have been dropped or damaged during handling.
Re-install the backup battery using the following procedure:
1. Lower the battery with the rubber end caps onto the GI 275 connector. Ensure proper alignment
and push down to seat the connector.
2. The unit will automatically power on. Power off the unit.
3. Re-install the battery cover and the four screws. Torque screws 6 to 8 in-lbf.
4. Re-install the GI 275 in accordance with Section 5.1.2.
5.2.4

Backup Battery Checkout

1. Perform the LRU Status Check in Section 5.9.1.1 to ensure the battery is connected properly.
2. If the battery was replaced, perform the Backup Battery Check as described in Section 5.7.3.
190-02246-C2
Rev. 3
GI 275 Part 27 AML STC Maintenance Manual
Page 5-6