ELCA MIRAGE-M Replacement Battery 7.4V 3400mAh LI-TE

ELCA MIRAGE-M / BRAVO-M — 7.4V Li-ion Replacement Battery (LI-TE)

This 7.4V 3400mAh Li-ion battery replaces the OEM LI-TE cell in ELCA MIRAGE-M and BRAVO-M wireless crane remote controls. It fits the same battery compartment and connector as the original, maintaining the voltage rail the remote's transmitter board requires. Capacity is 25.16Wh as supplied.

• MIRAGE-M and BRAVO-M platform fit: Both models share the same 7.4V two-cell Li-ion architecture, connector pinout, and BMS communication handshake — that is why one part number covers both. Swapping between platforms does not require firmware or charger changes.
• Bench tested on actual hardware: We cycled this cell through full charge and discharge on the MIRAGE-M platform. The BMS initialised correctly, voltage held steady across solenoid activation events, and the low-battery indicator did not trigger until the cell reached the expected cutoff threshold.
• Storage charge for infrequent crane use: Crane remotes often sit idle between jobs. If the remote will be unused for more than three weeks, charge the battery first. Li-ion cells discharged below 2.5V per cell enter BMS lockout — the charger may show activity but the cell will not recover.

Solenoid activation causing power dropout on a freshly installed battery

When a crane remote fires a solenoid or relay, the inrush current spike can briefly pull the battery bus voltage below the BMS protection threshold. If the battery arrived at storage voltage — typically 3.7V per cell — its internal impedance is higher than a fully charged cell, which makes it more vulnerable to that spike. The BMS interprets the voltage dip as an overcurrent event and shuts down the output rail. Charge the battery fully to 8.4V before the first operational use to lower cell impedance and keep the bus stable during activation.

Remote showing low battery immediately after swapping in a new cell

A new Li-ion cell ships at roughly 50–60% state of charge — around 7.3–7.5V — not at full voltage. The MIRAGE-M remote reads cell voltage to determine charge state, and at storage voltage the indicator correctly flags a low condition. This is not a faulty battery. Connect the battery to the ELCA charger and run a full charge cycle until the charger indicates complete, which puts the pack at 8.4V, before returning the remote to service.