Becker Traffic Assist 7928 Replacement Battery 3.7V 2400mAh

Becker Traffic Assist 7928 / BE7928 — 3.7V Li-ion Replacement Battery (BP-LP1100/12-A1)

This is a 3.7V, 2400mAh Li-ion cell built to the BP-LP1100/12-A1 specification for the Becker Traffic Assist 7928 and BE7928 GPS navigators. It fits the dashboard-mounted unit directly, restoring the device's ability to run on battery power away from the car charger. Voltage, connector, and BMS handshake all match the original cell.

• Traffic Assist 7928 and BE7928 compatibility: Both models share the same 3.7V power rail, connector pinout, and BP-LP1100/12-A1 cell specification — one replacement covers either unit without modification.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on the Traffic Assist platform and confirmed the BMS communicates correctly with the device's charge controller, accepting a full charge without triggering protection cutoff.
• First fix after fitting: After fitting this cell, power the unit on outdoors and let it acquire a satellite fix before driving. The GPS performs a cold start after any full power interruption — first fix typically takes 5–10 minutes; subsequent warm starts are under a minute.

GPS accuracy dropping as the Traffic Assist 7928 battery level falls

At low state of charge, the Traffic Assist 7928 reduces power to the GPS receiver module to extend remaining battery life. Lower receiver power means reduced signal sensitivity, which can cause the position fix to wander or lose lock in areas with marginal signal — underground car parks, dense urban canyons, or tree cover. This is a firmware-level power management decision, not a fault with the antenna. Keeping the battery above roughly 3.6V under load keeps the receiver running at full sensitivity.

Traffic Assist 7928 shutting off with no low-battery warning

After fitting a new cell, the device's fuel gauge is uncalibrated — it no longer has accurate data on the cell's actual discharge curve. The on-screen battery indicator can show two or three bars right up until the protection circuit cuts off at the low-voltage threshold, giving no useful warning. Running two full charge-to-discharge cycles calibrates the gauge so the warning appears at the correct point. Charge to 100%, navigate until the unit shuts itself off, then repeat once more.