Garmin Aera 795 GPS Replacement Battery 7.4V 6800mAh

Garmin Aera 795 / Aera 796 — 7.4V Li-ion Replacement Battery (010-11756-04)

This 7.4V Li-ion cell replaces the original battery in the Garmin Aera 795 and Aera 796 portable aviation GPS navigators. Capacity is 6800mAh (50.32Wh), matching the original specification. It fits both units — the Aera 795 and 796 share the same battery bay and connector.

• Aera 795 and 796 compatibility: Both models run on the same 7.4V battery platform and use identical physical connectors and BMS communication lines. One cell covers both units without modification.
• Bench tested on actual hardware: We ran this cell through full charge and discharge cycles on the Aera platform. The BMS handshake completed correctly — charge acceptance, low-voltage cutoff, and capacity reporting all registered within factory parameters.
• Cold-start satellite acquisition after battery swap: After fitting this cell, power the unit on outdoors before your first flight and let it acquire a satellite fix on the ground. A full power interruption triggers a cold start — first fix can take 5–10 minutes. Subsequent warm starts return to under a minute.

Why the Aera 795 shuts off without warning at low battery

After extended use, the fuel gauge IC on an aging battery loses calibration — the reported state-of-charge drifts away from actual cell voltage. The device reads 15–20% remaining and then hits the hardware undervoltage cutoff at 6.0V before the visual low-battery warning has time to fire. Fitting a new cell resets this drift because the fuel gauge re-learns from a full, healthy charge cycle. After the first full charge, run the Aera down to automatic shutdown once to allow the gauge to anchor its calibration.

GPS accuracy drops or receiver sensitivity reduces at low charge

The Aera 795 reduces power to the GPS receiver module when cell voltage sags below approximately 7.0V under load. Lower receiver power means weaker signal processing — the unit may drop from a 3D fix to a 2D fix or lose marginal satellites entirely. This is a firmware-level power management decision, not a hardware fault. Keep the cell above 50% charge during active navigation to hold full receiver sensitivity and maintain 3D fix quality.