About this replacement
Cavotec MC3300 — 7.4V Li-ion Replacement Battery (M9-1051-3600)
This 7.4V, 3400mAh Li-ion battery replaces the original cell in the Cavotec MC3300 wireless crane remote control system. It fits the handheld transmitter used to operate overhead cranes and material handling equipment on industrial sites. Swap it in when the original battery no longer holds a charge or the remote shuts down mid-operation.
- MC3300 transmitter fit: The MC3300 remote uses a dedicated battery bay with a specific connector and BMS handshake tied to the M9-1051-3600 part number. This cell matches that voltage rail and connector so the remote's onboard controller accepts it without fault codes.
- Bench tested on actual hardware: We ran this cell through charge and discharge cycles on the MC3300 platform. The BMS responded correctly to charge termination at 8.4V and cut off at the low-voltage threshold without locking the remote out.
- Monthly charge during idle periods: Crane remotes often sit unused for weeks between jobs. Keep this battery charged once a month during those gaps — Li-ion cells discharged below 2.5V per cell trigger BMS deep-discharge lockout, and the charger may not recover them.
Solenoid activation causing power dropout on the MC3300
When the MC3300 transmitter sends a crane command, the solenoid or relay in the receiver pulls significant inrush current back through the control loop. A partially discharged or degraded battery can sag below the BMS cutoff voltage at that moment, causing the remote to drop out mid-command. This is not a fault with the remote itself — it is a battery capacity issue. Install a fully charged cell and verify voltage reads at or above 7.8V before operating.
Remote showing low battery immediately after a new cell is installed
Replacement cells ship at storage voltage — typically 3.7V to 3.85V per cell, which reads as partial charge on the MC3300's indicator. The remote is not defective and the battery is not faulty. Connect the battery to the Cavotec charger and run a full charge cycle before first use. The low-battery indicator should clear once the pack reaches approximately 8.2–8.4V.