About this replacement
Hetronic HH-S / HH-M / HH-L — 3.6V Ni-MH Replacement Battery (68305001)
This is a 3.6V, 2000mAh Ni-MH replacement battery for the Hetronic HH-S, HH-M, and HH-L wireless crane remote controls. It replaces OEM part number 68305001. These remotes are used in industrial lifting and material handling — the battery is the only power source for all control signals sent to the hoist or crane.
- HH-S, HH-M, and HH-L compatibility: All three models run the same 3.6V single-cell Ni-MH architecture with identical connector placement and BMS handshake protocol. One battery pack covers the full HH series without modification.
- Bench tested on actual hardware: We cycled this pack through repeated solenoid-activation sequences on the HH-S platform. The BMS held stable through inrush current spikes and returned to nominal voltage within expected recovery windows.
- Monthly charge during idle periods: Crane remotes often sit unused for weeks between jobs. Ni-MH cells self-discharge at roughly 1–3% per day. A battery left uncharged for two months can drop below the BMS recovery threshold — charge the pack once a month even when the remote is shelved.
Solenoid activation causing power dropout on a freshly installed battery
When the HH-S remote triggers a solenoid or relay on the crane, inrush current spikes hard and fast. A Ni-MH cell at storage voltage — around 1.1V — has limited peak-current delivery and the BMS may interpret the sag as a fault and cut output. This is not a defective battery. The fix is to fully charge the pack before the first activation cycle. A full charge brings internal resistance down and allows the cell to supply the brief current surge without tripping the protection circuit.
Remote showing low battery immediately after swapping in a new cell
A new Ni-MH pack ships at storage voltage, typically 1.1–1.2V per cell — below the threshold the HH remote firmware reads as "full." The remote reports low battery because that reading is accurate at that voltage. This is not a fault with the pack. Connect the remote to its charger and run a complete charge cycle before use; the low-battery indicator should clear once the cell reaches 1.4V or above.