Cavotec M9-1051-3600 EX Replacement Battery 7.4V 3400mAh
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Cavotec M9-1051-3600 EX Replacement Battery 7.4V 3400mAh - is backordered and will ship as soon as it is back in stock.
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Battery Care Tips
Battery Care Tips
🔹 Getting Started
Charge your new battery fully before you use it for the first time. Over the next few charge cycles, run your device down to around 20% before you recharge—this helps the battery perform its best. After that, charge whenever you need to.
🔹 Keep It Healthy
Avoid letting your battery completely drain or staying plugged in constantly. Both extremes wear it out faster. Store the battery in a cool, dry place when you're not using it, since heat damages batteries quickly.
Delivery and Shipping
Delivery and Shipping
🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.
Disclaimer
Disclaimer
⚠️ Disclaimer: All product names, trademarks, and registered trademarks belong to their respective owners.
🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.
Cavotec M9-1051-3600 EX Replacement Battery 7.4V 3400mAh - is backordered and will ship as soon as it is back in stock.
Voltage
7.4V
Amp
3400mAh
Cavotec M9-1051-3600 EX / MC-3000 — 7.4V Li-ion Replacement Battery (M5-1051-3600)
This 7.4V 3400mAh Li-ion battery replaces the original pack in the Cavotec M9-1051-3600 EX, MC-3, and MC-3000 wireless crane remote controls. These remotes are used to operate overhead cranes and hoisting equipment in warehouses, ports, and heavy manufacturing facilities. Same voltage, same OEM part reference — no modifications needed at the remote.
- MC-3 and MC-3000 platform compatibility: The MC-3 and MC-3000 share the same battery bay geometry and 7.4V two-cell architecture as the M9-1051-3600 EX. All three models use the same BMS handshake protocol, so this pack communicates charge state to the remote's firmware without modification.
- Bench tested on actual hardware: We ran this battery under simulated solenoid activation cycles — the inrush current events that trip weaker packs. The BMS held voltage above the dropout threshold across repeated relay-switching loads without triggering a protection cutoff.
- Monthly charge cycle for idle remotes: Crane remotes often sit unused for weeks between operational periods. Charge this battery once a month during idle periods — Li-ion cells discharged below 2.5V per cell trigger BMS lockout, and the pack may not respond to a charger even when reconnected.
Solenoid activation causing power dropout on a new battery
When a crane remote activates a solenoid or relay, the inrush current spike can momentarily pull cell voltage below the BMS protection threshold. If that threshold is crossed, the BMS trips and the remote cuts out — even with a freshly installed battery. This is not a faulty battery; it is a BMS response to current demand exceeding the rated discharge limit. Ensure the replacement pack matches or exceeds the original capacity rating, and confirm the battery is fully charged before use — a partially charged cell has higher internal resistance and sags harder under load.
Remote showing low battery immediately after a new pack is installed
Replacement Li-ion packs ship at storage voltage — typically around 3.6V to 3.7V per cell, not full charge. The Cavotec remote reads cell voltage to calculate state of charge, so a pack at storage voltage registers as partially depleted the moment it is installed. This is expected behaviour, not a defective battery. Place the pack on charge before the first use and run it to full voltage — 4.2V per cell, or 8.4V total — before operating the crane.
Compatible Models
Replaces Part Numbers
Technical Specifications
Product Highlights
- Brand: Cavotec
- Manufacturer: CS
- Series: Standard
- Color: Black
- Product Type: Li-ion
- Battery Type: Li-ion
- Warranty: 12 Months
- Bulk Orders: sales@batteryweb.com
Frequently Asked Questions
My Cavotec MC-3000 remote won't power on at all after sitting unused for two months — is the battery dead?
Most likely the battery entered deep-discharge BMS lockout during storage. When Li-ion cells drop below 2.5V per cell, the BMS disconnects the pack to prevent cell damage, and the remote shows no signs of life even with what looks like a charged battery installed. Connect the battery to a compatible charger and leave it for at least 30 minutes — some BMS circuits require a trickle pre-charge phase before they release the lockout. If voltage recovers to above 5V on the pack, the charger should then bring it to full charge normally.
The crane remote cuts out mid-operation every time I activate the hoist — it powers back on within seconds but keeps dropping out.
This is a BMS trip caused by inrush current during solenoid or contactor activation. The sudden current demand pulls cell voltage below the BMS protection threshold, the pack disconnects, and the remote reboots once internal voltage recovers. A battery that is not fully charged has higher internal resistance and sags further under the same load, making dropout more likely. Charge the pack fully to 8.4V before use and confirm the replacement capacity is 3400mAh — undersized cells cannot sustain the peak current draw these remotes produce during hoist activation.
E-stop response on the Cavotec remote feels slower than it used to — is this a battery issue?
E-stop transmission is voltage-dependent in these remotes — as pack voltage drops, signal response time increases. A degraded or partially charged battery cannot sustain the voltage rail the transmitter needs to fire the stop command at full speed. This becomes a safety concern in environments where stop response time is critical. Charge the battery fully to 8.4V before any safety-critical lifting operation, and replace the pack if resting voltage drops below 7.0V within an hour of a full charge.
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