TomTom XXL IQ Routes GPS Replacement Battery 3.7V 1100mAh

TomTom XXL IQ Routes — 3.7V Li-ion Replacement Battery (6027A0106201)

This is a 3.7V 1100mAh Li-ion cell for the TomTom XXL IQ Routes portable GPS navigator. It fits models 4EP0.001.02, 1EP0.029.01, and 5EP0.029.01 using OEM part number 6027A0106201. Replace this cell when the original no longer holds a charge or the unit shuts off unexpectedly during navigation.

• XXL IQ Routes model fit: These XXL variants share the same physical cell format — 52 × 34 × 5mm — and the same 3.7V nominal voltage rail. The connector pinout and BMS charge thresholds are consistent across all three model numbers listed.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the XXL platform. The BMS accepted a full charge from the unit's onboard charging circuit without flagging a fault, and the low-voltage cutoff triggered cleanly before cell stress.
• First fix after installation: After fitting this cell, power the GPS fully on outdoors and let it acquire a satellite fix before driving. The unit performs a cold start after any full power interruption — first fix typically takes 5 to 10 minutes. Subsequent warm starts drop to under a minute once almanac data is cached.

GPS accuracy reduced at low battery on the XXL IQ Routes

Some GPS units reduce receiver sensitivity as cell voltage drops toward the low-voltage cutoff threshold. On the XXL IQ Routes, this can show up as position drift or a weaker satellite signal count before the unit actually shuts off. It is not a firmware bug — it is the receiver conserving draw to stay alive on a depleted cell. A fully charged replacement cell restores the receiver to full sensitivity immediately.

XXL IQ Routes shuts off without warning during navigation

The on-screen battery indicator on this unit is calibrated against the original cell's discharge curve. After significant cell degradation, the indicator can show two bars while the actual cell voltage is already near cutoff. The BMS trips the shutdown at the correct voltage, but the visual warning arrives too late or not at all. After fitting a fresh cell, run two full charge and discharge cycles so the indicator re-calibrates — watch for the low-battery icon to appear above 3.5V as confirmation.