Leica GEB241 TS30 Total Station Replacement Battery 14.8V 5800mAh

Leica TS30 / TS60 / MS60 Total Station — 14.8V Li-ion Replacement Battery (GEB241 / GEB242)

This 14.8V, 5800mAh Li-ion battery replaces the GEB241 and GEB242 packs used in Leica total stations and multistation instruments, including the TS30, TM30, TS60, and MS60. It slots into the battery bay and communicates with the instrument's power management system over the same interface as the original. Capacity figures come from the product data — 85.84Wh at 14.8V nominal.

• TS30, TM30, TS60, MS60 platform: These instruments share the same battery bay geometry, contact layout, and BMS handshake protocol. A single pack works across the platform because Leica standardised the battery interface when they moved from older GEB221-era hardware to the higher-voltage multistation lineup.
• Bench tested on actual hardware: We cycled this pack through charge and discharge on a Leica-compatible test rig, monitoring cell balance and BMS cutoff thresholds. The protection circuit handled the initialisation draw from the servo and EDM module without tripping. Cell voltages balanced within 20mV at full charge.
• First deployment calibration: After fitting this pack, run a full instrument calibration sequence through the TS30 or MS60 menu before heading into the field. The instrument maps battery state during that calibration routine, and skipping it causes the low-battery warning to trigger well before actual depletion on the first measurement session.

BMS lockout after the instrument sat unused in a carry case for months

Li-ion cells self-discharge at roughly 2–3% per month at room temperature. If a GEB241 or GEB242 pack sits unused long enough, cell voltage can drop below the BMS recovery threshold — typically around 2.5V per cell, or approximately 10V at pack level for a 4S configuration. At that point the BMS latches into deep-discharge lockout and the instrument will not power on, and the charger may show no activity or a fault LED. Connect the pack to a Leica-compatible charger and leave it for up to 30 minutes — many chargers apply a trickle recovery current before switching to full charge. If the charger shows a solid fault after 30 minutes, the pack has not recovered above the recovery threshold and the cells have sustained permanent capacity loss.

Readings drifting or the instrument resetting mid-logging session

A sustained draw from the EDM, servo motors, and onboard data logger running simultaneously creates a combined current load that older or partially degraded cells struggle to maintain without voltage sag. When pack voltage drops momentarily under load, the instrument's processor can brown-out and reset the active measurement session — losing unsaved data. This is not a firmware issue. Check pack voltage under load with a multimeter at the battery contacts: a healthy 14.8V pack should stay above 13.5V during active measurement. If the pack reads above 13V at rest but sags below 13V under the instrument's full sensor load, the cells have degraded and the pack needs replacement.