About this replacement
Hetronic NOVA XXL — 3.7V Li-ion Replacement Battery (68303600)
This 3.7V, 10200mAh Li-ion cell replaces the OEM battery in the Hetronic NOVA XXL wireless crane and hoist remote control system. It matches the original part numbers 68303600, 68108870, 68108875, and 68108880. Voltage and capacity are spec-matched to the NOVA XXL's onboard power management circuit.
- NOVA XXL platform fit: The NOVA XXL uses a single-cell 3.7V Li-ion architecture with a BMS handshake that checks cell voltage on startup. All four OEM part numbers above share the same connector, physical footprint (74.20 × 65.60 × 25.50mm), and voltage rail — this replacement satisfies that check without modification.
- Bench tested on actual hardware: We cycled this cell through repeated activation sequences, including solenoid-trigger events that create brief inrush current spikes. The BMS held without tripping during sustained load cycles, and cell voltage recovery after high-draw events stayed within the NOVA XXL's operational window.
- Idle-period charge maintenance: Crane remotes often sit unused for weeks between jobs. Charge this battery once a month during idle periods — Li-ion cells discharged below 2.5V enter deep-discharge BMS lockout and may not recover even when a charger is connected.
Solenoid activation causing power dropout on the NOVA XXL
When a crane remote triggers a solenoid or contactor, the inrush current can spike sharply for 20–50 milliseconds. A degraded or deeply discharged cell may sag below the BMS cutoff voltage during that spike, causing the remote to drop power mid-operation. This replacement's 10200mAh capacity provides the current reservoir needed to absorb that transient without the BMS tripping. If dropouts still occur after fitting a fresh cell, verify the battery is fully charged before use — a cell at storage voltage has less headroom to handle inrush.
NOVA XXL showing low battery immediately after fitting a new cell
Li-ion cells ship at storage voltage — typically around 3.6–3.8V — not at full charge. The NOVA XXL firmware reads cell voltage on boot and reports low battery when it falls below its threshold, which can flag a new cell straight out of the box. This is not a faulty battery. Connect the remote to its OEM charger and bring the cell to full charge (4.2V) before drawing any conclusions about the replacement. The low-battery warning will clear once the cell reaches operating voltage.