6N-70AA Holzleitner AMEISE Crane Remote Replacement Battery 7.2V

Holzleitner AMEISE — 7.2V Ni-MH Replacement Battery (6N-70AA)

This 7.2V 700mAh Ni-MH battery replaces the OEM 6N-70AA cell pack in the Holzleitner AMEISE crane remote control. It fits the wireless handheld transmitter operators use to command overhead crane and hoist movements from the floor. Voltage and capacity match the original spec exactly — no modifications needed.

• AMEISE remote transmitter fit: The AMEISE transmitter runs a 7.2V rail with a connector and cell arrangement specific to this remote series. Swapping to a different voltage or chemistry will cause the BMS to reject the pack or, worse, operate outside safe thresholds for the solenoid control circuitry.
• Bench tested on actual hardware: We cycled this pack through repeated solenoid-activation sequences — the load spikes that kill weak cells fastest. The BMS held cutoff correctly at low-voltage threshold and recovered to normal output on recharge without triggering protection lockout.
• Monthly charge during idle storage: Crane remotes often sit unused for weeks or months between jobs. Ni-MH cells self-discharge at roughly 20–30% per month. If the pack drops too low before the next use, the remote may not power on at all. Charge the battery once a month during any idle period to keep cells above the minimum recovery threshold.

Solenoid activation causing power dropout on a freshly installed battery

When the AMEISE remote sends a crane command, the transmitter draws a sharp inrush current to trigger the relay or solenoid circuit. A Ni-MH cell at partial charge or at storage voltage can't sustain that spike — voltage sags below the BMS cutoff and the remote shuts off mid-command. This is not a fault in the remote or the battery. It happens because the cell hasn't been brought to full charge before use. Fully charge the 6N-70AA pack before the first command cycle — a full charge brings terminal voltage to approximately 8.6V for a 6-cell Ni-MH pack at rest.

Remote showing low battery warning immediately after new cell install

A new Ni-MH battery ships at storage voltage — typically 60–70% of rated capacity — not full charge. The AMEISE remote reads this as low battery because it is, relative to the threshold the transmitter expects for normal operation. This is not a defective cell. Connect the battery to the correct Ni-MH charger and run a full charge cycle before use. Once fully charged, the low-battery indicator will clear and the remote will operate normally.