About this replacement
TomTom GO 510 / GO 520 Series — 3.7V Li-ion Replacement Battery (AHA11110004)
This is a 3.7V, 1100mAh Li-ion cell that fits the TomTom GO 510, GO 520, GO 520 WiFi, and related 4FA50-series portable GPS navigators. It replaces OEM part AHA11110004 directly. Capacity matches the original spec — 4.07Wh total energy.
- GO 510 / GO 520 platform fit: These models share the same battery bay dimensions, 3.7V supply rail, and connector orientation. The BMS handshake on this cell communicates state-of-charge data back to the GO navigator's power management IC, so the on-screen battery indicator reads correctly from the first charge cycle.
- Bench tested on actual hardware: We cycled this cell through full charge and discharge on a GO 510 unit. The BMS held the cutoff at the expected low-voltage threshold and did not trip during screen-on navigation with GPS active. No false low-battery flags appeared during testing.
- Cold-start satellite acquisition after installation: After fitting this cell and powering the device on for the first time outdoors, allow the GO to complete a full cold-start satellite fix before driving. The navigator loses its ephemeris data on full power removal, so the first fix after a battery swap typically takes 5–10 minutes in open sky — subsequent warm starts return to under a minute.
GPS accuracy reduced at low battery on the GO 510
The GO 510 receiver section draws more current than the display during active navigation. When cell voltage drops toward 3.5V, the device's power management begins throttling the GPS receiver to protect the remaining charge. This reduction in receiver sensitivity means position fixes become less frequent and accuracy degrades before the device shows a low-battery warning. Keeping the cell above 3.6V during use avoids this behaviour entirely.
GO 510 shuts off without warning before the battery indicator hits zero
This is a calibration issue between the new cell and the fuel gauge IC. The GO 510 carries over its charge-state estimate from the old, degraded battery, so the percentage shown on screen no longer matches actual cell voltage. The device hits the hardware low-voltage cutoff — typically around 3.3V — while the indicator still shows 15–20% remaining. Run two full charge-to-discharge cycles and the gauge recalibrates to the new cell's actual capacity curve.