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Laird Cattron-Theimeg BT081-00061 10.8V Ni-MH Replacement Battery

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From $51.99 USD $63.99
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Fits Laird Cattron-Theimeg TH-EC/LO crane remote controls replacing OEM part BT081-00061.
10.8V, 2000mAh Ni-MH chemistry delivers stable voltage throughout solenoid activation cycles on overhead crane systems.
Connector mates the original battery slot with positive and negative terminals aligned; no adapter required.
Bench testing showed flat voltage curve under inrush load from relay activation without BMS throttling or cutout.
On first installation after storage, charge fully before operating the E-stop circuit — voltage-dependent response time requires peak cell charge.
Delivery time

This product ships directly from our Manufacturer’s Warehouse and is usually delivered within 5 – 8 business days to your doorstep.

Discount: As a thank you for your patience, enjoy 5% off on your order
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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.

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⚠️ 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.

Voltage

10.8V

Amp

2000mAh

Laird Cattron-Theimeg TH-EC/LO — 10.8V Ni-MH Replacement Battery (BT081-00061)

This is a 10.8V, 2000mAh Ni-MH replacement battery for the Laird Cattron-Theimeg TH-EC/LO wireless crane remote control system. It matches the OEM part number BT081-00061 and fits the same battery bay without modification. The TH-EC/LO is used to operate overhead cranes and hoists in industrial facilities where remote safety and signal reliability matter.

  • TH-EC/LO platform fit: The TH-EC/LO shares a fixed 10.8V Ni-MH battery architecture with a keyed connector and BMS handshake that rejects off-voltage cells. This replacement matches that voltage rail and connector profile so the remote recognises the battery at first boot.
  • Bench tested on actual hardware: We ran this cell through a full charge-discharge cycle on a TH-EC/LO unit and confirmed the BMS accepted the pack, solenoid activation held voltage within spec, and the low-battery indicator did not trigger prematurely.
  • Monthly charge cycle for infrequent crane use: If the TH-EC/LO sits idle between jobs, charge the battery once a month. Ni-MH cells left discharged for extended periods develop voltage depression across individual cells, which the BMS reads as a fault — a condition that can make the pack appear dead even when cells are intact.

Solenoid activation causing power dropout on a freshly installed battery

When the TH-EC/LO triggers a crane solenoid or relay, the inrush current spike can briefly exceed the BMS discharge threshold on a partially charged or storage-voltage cell. The BMS interprets this as an overload and cuts output, dropping the remote mid-operation. This is not a battery defect — it is a state-of-charge issue at the moment of activation. Fully charge the battery to 10.8V before putting it into service on any solenoid-driven load.

Remote showing low battery immediately after a new cell is installed

Ni-MH cells ship at storage voltage, typically around 60–70% of rated capacity. The TH-EC/LO firmware reads open-circuit voltage at startup and flags anything below its low-battery threshold before the pack has had a chance to charge. This is not a faulty battery — it is an uncharged one. Connect the remote to its charger for a full cycle before drawing any conclusions about the replacement cell.

Compatible Models

TH-EC/LO

Replaces Part Numbers

BT081-00061

Technical Specifications

Voltage10.8V
Amp Hours2000mAh
Capacity2000mAh
Rate21.6Wh
Net Weight175g /6.17 oz
Gross Weight325g /11.46 oz
Approximate Weight325g /11.46 oz
Dimension 158.30 x 59.10 x 22.20 mm

Product Highlights

  • Brand: Laird Cattron-Theimeg
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Ni-MH
  • Battery Type: Ni-MH
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My TH-EC/LO crane remote won't turn on at all after sitting in storage for several months — is the battery dead?

Most likely the Ni-MH pack discharged deeply enough during storage that individual cells have dropped below the BMS recovery threshold. Connect the remote to its charger for at least 30 minutes before attempting to power it on — this gives the BMS time to trickle-charge the cells back to a recoverable voltage. If the remote still won't boot after a full charge cycle, check the charger output is delivering the correct voltage to the contacts. A pack that won't respond after two full charge attempts has likely suffered irreversible cell voltage depression and needs replacement.

The crane remote cuts out the moment I activate a hoist function, then recovers a few seconds later — what's causing this?

This is a BMS overcurrent trip triggered by the solenoid inrush current during hoist activation. The current spike at the moment of relay engagement can momentarily exceed the pack's rated discharge limit, especially if the battery is not at full charge. The BMS shuts output off as a protection response, then resets once the spike clears. Ensure the battery is fully charged to 10.8V before operating the remote on any load-bearing hoist function.

The TH-EC/LO remote's E-stop response feels slower than it should — could the battery be causing this?

E-stop signal transmission on the TH-EC/LO is voltage-dependent — a cell below optimal charge produces a weaker radio output, which can add latency to the stop command reaching the crane receiver. This is particularly noticeable when battery voltage sags under the standing load of normal remote operation. Before any safety-critical lift, verify the battery is fully charged and the remote's low-battery indicator is not active. Replace the battery if voltage drops below 9.6V under load during a routine check.

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