Liebherr Funkst 6V Crane Remote Control Ni-MH Replacement Battery

Liebherr Funkst Crane Remote Control — 6V Ni-MH Replacement Battery

This 6V 2000mAh (12Wh) Ni-MH battery fits the Liebherr Funkst wireless crane remote control. It restores power to the handheld transmitter used to operate Liebherr industrial cranes and lifting equipment on job sites. Voltage and cell chemistry match the original factory specification.

• Funkst remote compatibility: The Funkst transmitter runs a 6V Ni-MH cell pack with a specific connector orientation and BMS handshake. Swapping to a mismatched voltage or chemistry causes the remote to fail its self-check at power-on — this cell pack clears that check.
• Bench tested on actual hardware: We cycled this pack through full charge and load discharge on the bench. The BMS held nominal voltage across simulated solenoid activation pulses without triggering a dropout or protection cutoff.
• Monthly charge cycle for infrequent use: Crane remotes often sit idle between projects. Ni-MH cells lose charge through self-discharge at roughly 1–2% per day at room temperature. Charge this pack once a month during idle periods — cells left fully discharged for weeks can drop below the recovery threshold and refuse a normal charge cycle.

Solenoid activation causing power dropout on a freshly installed battery

When the Funkst remote triggers a crane solenoid or relay, the inrush current spike can briefly exceed what the BMS allows. If the battery cell voltage is low — even slightly below nominal — the BMS interprets the spike as an overload and cuts output. This shows up as the remote going dark for a second during command transmission. A fully charged pack sits at around 7.2V open circuit for a 6V Ni-MH; that headroom absorbs the inrush without tripping protection. Always charge to full before first use and after any extended storage.

Remote showing "low battery" immediately after fitting a new cell

New Ni-MH cells ship at storage voltage — typically 50–70% state of charge — not at full capacity. The Funkst remote reads cell voltage during startup and flags anything below its internal threshold as low battery, even on a brand-new pack. This is not a faulty battery. Connect it to the charger for a full cycle before use. Once the pack reaches 6V–7.2V under load, the low-battery indicator clears and the remote operates normally.