About this replacement
Guldmann GH3 / GH3+ Ceiling Lift — 24V Ni-MH Replacement Battery (110765)
This is a 24V, 3000mAh Ni-MH replacement battery for the Guldmann GH3 and GH3+ ceiling lift systems. It matches OEM part numbers 110765, 550182, and B11908. The battery powers the motorized hoist that lifts and transfers patients in clinical and home care settings.
- GH3 and GH3+ compatibility: Both models share the same 24V battery rail, connector pinout, and BMS handshake protocol. A single cell format covers both variants without modification.
- Bench tested on actual hardware: We cycled this battery through full charge and discharge on a GH3 hoist. The BMS completed its verification sequence, accepted the cell, and reported correct charge state across multiple cycles.
- Post-installation self-test: After fitting this battery, let the GH3 complete its full power-on self-test without cycling power mid-sequence. Ni-MH cells have a slightly different impedance profile than a worn OEM battery, and the hoist BMS runs a brief verification at startup. Interrupting that sequence can trigger a persistent battery fault that clears only on a full reboot.
Why the GH3 alarms low battery immediately after a confirmed full charge
The GH3 BMS uses a learned impedance baseline to validate battery state. A new Ni-MH cell has higher internal resistance than a conditioned pack, so the BMS can interpret that as a low or degraded battery even when the cell is fully charged. This is not a fault with the replacement — it is the BMS applying its threshold against an unconditioned cell. Run one complete charge-discharge-recharge cycle and the alarm clears as the BMS updates its baseline. After that first cycle, normal operation resumes.
GH3 will not power on after the battery has been in storage
Ni-MH cells self-discharge in storage, and if the pack drops below approximately 18V, the GH3 BMS enters a protective state and refuses to boot. The fix is a slow pre-charge using the OEM charger — connect it and leave it for a full uninterrupted charge cycle before attempting to power on the hoist. Do not press the power button during this recovery charge, as that resets the charge IC and extends recovery time. Once the pack reaches at least 22V, the BMS will release its lockout and allow normal startup.