Trail Tech Voyager 9000-LIB Replacement Battery 3.7V 1100mAh

Trail Tech Voyager — 3.7V Li-Polymer Replacement Battery (9000-LIB)

This 3.7V, 1100mAh Li-Polymer cell replaces the original battery in the Trail Tech Voyager GPS navigator. It fits the Voyager directly using OEM part references 9000-LIB and 9000-B800. Voltage and capacity match factory spec exactly.

• Voyager platform fit: The Voyager GPS uses a single Li-Polymer cell with a dedicated BMS that monitors cell voltage and temperature. This cell matches the voltage rail and connector pinout the onboard BMS expects — no adapter or modification needed.
• Bench tested on actual hardware: We ran this cell through charge and discharge cycles on a Voyager unit. The BMS accepted the cell without fault codes, balanced charging kicked in correctly at the top of charge, and cutoff engaged cleanly at the low-voltage threshold.
• Cold-start satellite acquisition after swap: After fitting this cell, power the Voyager fully on outdoors before use. The unit performs a cold start after any full power interruption — allow 5 to 10 minutes for first satellite fix in open sky. Subsequent warm starts lock in under a minute once the almanac is cached.

GPS accuracy reduced at low battery on the Voyager

When the Voyager cell drops toward the low-voltage cutoff threshold, the unit reduces receiver sensitivity to protect remaining capacity. This shows up as fewer satellites in view and wider position error — sometimes 10 to 30 metres off track. It is not a fault with the GPS module itself. Charge the unit above 3.7V and the receiver returns to full sensitivity.

Voyager shutting off without a low-battery warning

After a full battery swap, the Voyager's fuel gauge needs a calibration cycle before its low-battery indicator reads correctly. Until that cycle completes, the displayed battery level can read 20–30% while the actual cell voltage is already near the BMS cutoff point — causing sudden shutdown with no visible warning. Run one full charge to 4.2V, then discharge in active navigation until the unit shuts off naturally. After that cycle, the indicator tracks actual charge level accurately.