Hetronic 900 Crane Remote Replacement Battery 3.6V 2000mAh

Hetronic CS 434 / ERGO Series — 3.6V Ni-MH Replacement Battery (900)

This is a 3.6V, 2000mAh Ni-MH battery for the Hetronic CS 434, ERGO, ERGO-F, and EURO series wireless crane remote controls. It replaces OEM part numbers including 900, 68300520, 68300600, and related variants used in overhead crane and material handling remote transmitters. Voltage and capacity match the original specification from the product data.

• CS 434, ERGO, and EURO platform fit: These remotes share the same battery bay geometry, connector pinout, and 3.6V supply rail across the range. One cell format covers the full transmitter lineup because Hetronic standardised the power module across generations to simplify field replacement on job sites.
• Bench tested on actual hardware: We cycled this cell through charge and discharge on a Hetronic-compatible transmitter. The BMS accepted charge without error flags, and output voltage held stable through repeated solenoid activation commands without dropout.
• Monthly charge cycle for idle remotes: Crane remotes often sit unused for weeks between lifts. Ni-MH cells self-discharge at roughly 1–3% per day at room temperature. A remote left uncharged for two or three months can drop below the transmitter's minimum operating threshold and fail to power on — charge once a month during idle periods to prevent this.

Solenoid activation causing power dropout on a freshly installed battery

When an operator commands a lift, the remote fires a solenoid or relay signal that draws a brief inrush current spike. A Ni-MH cell at partial charge has elevated internal resistance, and that spike can pull the transmitter's supply voltage below its cutoff threshold for a fraction of a second — long enough to reset or drop the signal. This is not a fault in the remote; it is the battery's state of charge. Charge the cell fully before putting a newly installed battery into service on active lifting operations.

Remote showing low battery indicator immediately after a new cell is installed

Replacement Ni-MH cells ship at storage voltage, typically around 1.0–1.1V per cell, which is below the 1.2V nominal operating point. The Hetronic transmitter reads this as a low battery condition the moment it boots. This is not a defective cell. Connect the remote to its charger for a full charge cycle before use — once the cell reaches nominal voltage, the low battery indicator clears and the remote operates normally.