Garmin Quest Compatible Battery IA3Y117F2 3.7V

Garmin Quest — 3.7V Li-ion Replacement Battery (IA3Y117F2)

This is a 3.7V, 1000mAh Li-ion cell that replaces part number IA3Y117F2 in the Garmin Quest handheld GPS navigator. The Quest is a portable outdoor navigation device used for waypoint tracking and route guidance. Fit this cell when the original no longer holds enough charge to sustain active navigation sessions.

• Quest platform fit: The Quest uses a single-cell 3.7V Li-ion pack with a direct connector to the device's power management circuit. This cell matches that voltage rail and connector, so the device's charge controller communicates with the cell without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the bench, confirmed the BMS engaged at the correct low-voltage cutoff, and verified the Quest's charge indicator tracked the state of charge accurately across the full cycle.
• Cold-start satellite acquisition after swap: After fitting this cell, power the Quest on outdoors before first use. A full power interruption clears the GPS receiver's almanac data, triggering a cold start — budget 5 to 10 minutes for the first satellite fix versus under a minute for a subsequent warm start.

GPS accuracy reduced as battery level drops on the Quest

The Quest's GPS receiver draws consistent power to maintain signal sensitivity. At low cell voltage — typically below 3.5V — some units reduce receiver gain to protect remaining charge. This shows up as position drift or slower fix refresh, not a hardware fault. Keeping the cell above 3.6V during active navigation keeps the receiver running at full sensitivity.

Quest shutting off without warning before the battery indicator hits empty

A new cell's charge indicator needs one or two full cycles before the Quest's fuel gauge calibrates to it. Until then, the device's low-battery threshold can trigger a hard cutoff while the display still shows one bar remaining. Run the Quest down to automatic shutdown, then charge it fully to 4.2V — repeat once more and the indicator will track accurately.