Geospace GSB-LHR Compatible Battery 3.7V 800mAh

GEOSPACE GSB-LHR Line Health Recorder — 3.7V Li-ion Replacement Battery (1ICR55/35/46)

This 3.7V, 800mAh Li-ion cell replaces the internal battery in the GEOSPACE GSB-LHR Line Health Recorder. The GSB-LHR is a portable seismic data logging unit used in oil and gas surveys, geotechnical investigations, and earthquake monitoring deployments. Voltage and capacity match the OEM specification exactly — 3.7V nominal, 800mAh (2.96Wh).

• GSB-LHR and Line Health Recorder fit: Both designations refer to the same instrument platform. The cell format — 49.80 × 34.00 × 5.60mm — matches the internal battery bay, and the BMS handshake operates on the same voltage rail as the original pack.
• Bench tested on actual hardware: We cycled this cell through sensor initialisation events and sustained logging loads. The BMS held without tripping on the current spike at probe power-up, and voltage remained stable under continuous acquisition draw.
• Post-install calibration cycle: After fitting this battery, run a full calibration cycle through the instrument menu before field deployment. The GSB-LHR maps battery state during calibration — skipping this step causes premature low-battery warnings during the first active logging session.

BMS cutoff during seismic sensor initialisation on the GSB-LHR

When the GSB-LHR powers up a connected geophone or sensor string, it draws a short surge current to initialise the probe circuit. A worn or deeply discharged cell can't sustain that spike, and the BMS trips as a protection response — cutting power instantly. This looks like the instrument shutting off at startup, not a charging fault. The replacement cell's fresh capacity handles the initialisation surge without the voltage rail collapsing below the BMS cutoff threshold.

GSB-LHR not recognising a new pack after the unit sat in a carry case for months

Li-ion cells self-discharge during storage. If the GSB-LHR sat unused long enough, the cell voltage can drop below the BMS re-initialisation threshold — typically around 2.5V — and the pack enters sleep mode. The instrument then fails to detect any battery at all, or shows a battery error on screen. To recover, connect the charger and leave it for 15–20 minutes before attempting to power on; most BMS circuits re-initialise once the cell rises above 2.8V.