Vernier Go Wireless Link 3.7V Replacement Battery GW-BAT-250

Vernier Go Wireless Link — 3.7V Li-Polymer Replacement Battery (GW-BAT-250)

This is a 3.7V, 230mAh Li-Polymer cell for the Vernier Go Wireless Link wireless data interface. It fits the Go Wireless Link module directly, restoring the unit's ability to transmit sensor data to computers and tablets during lab sessions. Voltage and capacity match the OEM spec: 3.7V nominal, 0.85Wh.

• Go Wireless Link platform fit: The Go Wireless Link uses a compact Li-Polymer cell in a fixed form factor — 36.85 × 19.70 × 4.40mm — with a single-cell BMS matched to 3.7V nominal. Any cell outside that envelope or voltage class will not seat correctly or communicate with the charge circuit.
• Bench tested on actual hardware: We cycled this cell through the Go Wireless Link's charge and discharge circuit, confirming the BMS accepted the pack, charged to 4.2V cutoff, and transitioned cleanly to discharge under simulated wireless transmission load without tripping overcurrent protection.
• Post-install calibration step: After fitting this battery, run the Go Wireless Link through a full connect-and-log cycle with a sensor attached before your first real session. The module's state-of-charge indicator maps to cell voltage during active use — skipping this causes the low-battery warning to fire early on the first deployment.

BMS lockout after the Go Wireless Link sat unused in a carry case for months

Li-Polymer cells self-discharge at roughly 1–2% per month under storage conditions. After several months in a case, the cell voltage can drop below 3.0V — the point where most BMS circuits engage deep-discharge protection and lock the output. When this happens, the module will not power on and the charge LED may not respond. Connect the unit to a known-good USB charger and leave it for 30–60 minutes without interruption; most BMS circuits require a trickle recovery phase before they re-enable the main output path.

Readings drifting or logging session resetting mid-experiment

The Go Wireless Link sustains a continuous radio transmission load while sensors are active, and an aging or partially discharged cell can sag below the module's operating voltage threshold under that sustained draw. When voltage drops momentarily, the wireless link resets — which appears in the data as a gap, a drift artefact, or a full session restart. This is not a sensor fault. Fit a fresh cell and confirm resting voltage reads above 3.7V before starting a logging session to avoid mid-run dropouts.