About this replacement
Pioneer AVIC-F320BT / AVIC-F310BT — 3.7V Li-ion Replacement Battery (338937010176)
This 3.7V 790mAh Li-ion cell replaces the internal battery in the Pioneer AVIC-F320BT and AVIC-F310BT in-car GPS navigation units, along with the AVIC-F220 and AVIC-U series. It powers the navigation processor, Bluetooth radio, and display backlight. Capacity is 2.92Wh, matching the original specification.
- AVIC-F320BT / F310BT / F220 / AVIC-U compatibility: These models share the same 3.7V single-cell architecture, connector pinout, and BMS communication protocol. Swapping cells across this group requires no firmware changes or connector modification.
- Bench tested on actual hardware: We cycled this cell through charge and discharge on the AVIC platform and confirmed the BMS accepted the cell without fault codes. Charge termination triggered correctly at full capacity.
- Cold-start satellite acquisition after fitting: After fitting this cell, power the unit fully on outdoors and let it acquire a satellite fix before driving. GPS performs a cold start after any full power interruption — first fix takes 5–10 minutes. Subsequent warm starts run under a minute once the almanac data rebuilds.
Saved routes and POIs disappearing after battery swap
The AVIC-F320BT stores some route history and POI data in battery-backed RAM. When the internal cell is fully removed, that volatile memory loses power and the stored data is wiped. This is not a fault with the replacement cell — it is a consequence of power interruption to the memory circuit. After fitting the new battery, re-enter any custom POIs and saved home or work addresses manually in the navigation menu.
Unit shuts off mid-route with no low-battery warning
This happens when the battery indicator is uncalibrated after a cell swap. The fuel gauge reads remaining charge based on learned charge cycles from the previous cell, so the percentage displayed does not reflect the new cell's actual state. The unit hits its voltage cutoff threshold — typically around 3.0V — before the visual warning triggers. Run two full charge-to-discharge cycles to let the gauge recalibrate against the new cell's actual discharge curve.