TomTom Quanta Replacement Battery VF3 3.7V 1100mAh

TomTom Quanta / Go XL330S — 3.7V Li-ion Replacement Battery (VF3)

This 3.7V 1100mAh Li-ion cell replaces the original VF3 battery in the TomTom Quanta and Go XL330S portable GPS navigators. It restores untethered operation when the original cell no longer holds a charge. Voltage and capacity match OEM spec exactly — no adapters or modifications needed.

• Quanta and Go XL330S compatibility: Both units run the same 3.7V single-cell architecture with an identical connector footprint and BMS handshake protocol, which is why one cell covers both models without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Quanta platform. The BMS accepted the cell immediately, reported charge state correctly, and held voltage steady through active navigation workloads with no unexpected cutoff events.
• Cold-start satellite acquisition after installation: After fitting this cell, power the unit on outdoors before driving. The GPS performs a cold start following any full power interruption — first satellite fix can take 5–10 minutes. Subsequent power cycles drop back to a warm-start fix in under a minute.

GPS accuracy reduced at low battery on the Quanta

When the Quanta's cell drops below roughly 3.5V, the device reduces power to the GPS receiver to protect remaining charge. This cuts antenna sensitivity, which degrades position accuracy and can cause the route marker to drift off-road. The fix is straightforward — plug into vehicle power or charge the unit before the indicator hits one bar. A fresh cell at full charge eliminates this threshold entirely during normal use.

Quanta shutting off without any low-battery warning

This happens when the battery indicator is no longer calibrated to the cell's actual discharge curve. The display still shows one or two bars when the cell voltage has already fallen to the BMS cutoff threshold — around 3.0V — so the device cuts out mid-route with no visual warning. After fitting a new cell, run it through one full charge cycle to let the device recalibrate the indicator. The shutdown-without-warning behaviour stops once the firmware maps the new cell's discharge curve correctly.