TomTom Rider 400 Compatible Battery 3.7V 2500mAh VF3W

TomTom Rider 400 / 410 / 550 — 3.7V Li-ion Replacement Battery (VF3W)

This 3.7V 2500mAh Li-ion cell replaces the original VF3W battery in TomTom Rider 400, Rider 410, Rider 550, and Great Rides Edition GPS navigators. These are motorcycle-mounted units that run continuously through long rides — the original cell degrades faster than a handheld GPS because of vibration, heat from the mounting position, and near-constant screen-on navigation use. Capacity is 2500mAh (9.25Wh), matching OEM spec.

• Rider 400 / 410 / 550 platform: All three models share the same cell housing, connector orientation, and BMS communication protocol. The VF3W part number covers the full range — voltage rail and contact pitch are identical across the lineup, so one cell fits all listed units.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles with the BMS active. The protection circuit responded correctly to over-charge and cell-temperature limits. No false cutoff events occurred during draw spikes from the GPS receiver and backlit display operating together.
• Cold-start satellite acquisition after fitting: After any full power interruption — including a battery swap — the Rider 400 loses its ephemeris data and performs a cold start. Take the unit outside and power it on before your ride. First satellite fix takes 5–10 minutes; warm starts after that are under a minute.

GPS accuracy reduced at low battery on the Rider 400

When cell voltage drops below roughly 3.5V, the Rider 400 reduces power to non-critical subsystems — and the GPS receiver sensitivity is one of them. The result is fewer satellites tracked, weaker signal lock, and occasional position jumps on the map. This is a firmware-level power-saving response, not a hardware fault. Keeping the battery above 3.6V under load maintains full receiver performance throughout a ride.

Device shuts off without low-battery warning on screen

A worn or newly fitted cell can cause the Rider 400 to cut power abruptly before the on-screen battery indicator reaches the warning threshold. The indicator is calibrated against the original cell's discharge curve — a new cell with a slightly different internal resistance reads differently under load. To recalibrate, run two full charge-discharge cycles with the unit actively navigating. After two cycles, the indicator tracks actual voltage accurately and warning appears at the correct point around 3.4V.