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Teletec AK1 Crane Remote Replacement Battery 9.6V 2000mAh

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From $73.99 USD $91.99
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Fits Teletec AK1 and AK4 crane remotes, replaces OEM part FW24.
9.6V 2000mAh Ni-MH chemistry sustains full solenoid activation power for lifting commands without voltage sag during repeated button presses.
Connector seats into the battery tray with a locking tab on the right side—push until the tab clicks and sits flush.
We bench-tested this cell in the AK1 platform; BMS accepted the new pack on first insertion with clean contact handshake and stable voltage delivery under load.
Crane remotes left idle for more than six weeks can discharge the Ni-MH pack below the activation threshold—charge for twenty minutes before operating the hoist to ensure full solenoid response during safety-critical moves.
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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

9.6V

Amp

2000mAh

Teletec AK1 / AK4 — 9.6V Ni-MH Replacement Battery (FW24)

This is a 9.6V 2000mAh Ni-MH replacement for the Teletec FW24 battery pack. It fits the AK1 and AK4 crane remote control units used on industrial crane and hoist systems. Capacity is rated at 19.2Wh, matching the original pack specification.

  • AK1 and AK4 platform fit: Both models run the same 9.6V rail and use the same FW24 pack format, so one cell configuration covers both remotes. The connector pinout and BMS handshake are identical across the AK series.
  • Bench tested on actual hardware: We cycled this pack through solenoid activation sequences on a crane remote test rig. The BMS held voltage above the dropout threshold during repeated relay inrush events without tripping.
  • First-use charge on crane remotes: Ni-MH cells ship at partial storage voltage — typically around 7–8V for a 9.6V pack. Run a full charge cycle before the first operational use, especially on safety-critical crane installations where a low-voltage dropout during an E-stop sequence would be a problem.

Why crane remotes drop out during solenoid activation

Solenoid and relay coils draw a short, sharp inrush current at the moment of activation — often three to five times the steady-state draw. On a depleted or aged Ni-MH pack, this spike pulls the pack voltage below the BMS cutoff threshold for a fraction of a second. The remote's microcontroller interprets that as a dead battery and shuts down. A fully charged 9.6V pack with healthy cells will hold above 9V under this inrush load; anything sagging below 7.5V during activation is a cell-capacity problem, not a charger or remote fault.

Remote shows low battery immediately after fitting a new cell

Ni-MH packs leave the warehouse at roughly 60–70% of nominal voltage to prevent self-discharge damage during storage and shipping. The AK remote reads pack voltage on boot and flags anything below its threshold as low. This is not a faulty cell — it is a cell at storage voltage. Connect to the Teletec charger and run a full charge cycle; the low-battery indicator will clear once the pack reaches approximately 9.6V resting voltage.

Compatible Models

AK1 AK4

Replaces Part Numbers

FW24

Technical Specifications

Voltage9.6V
Amp Hours2000mAh
Capacity2000mAh
Rate19.2Wh
Net Weight330g /11.64 oz
Gross Weight510g /17.99 oz
Approximate Weight510g /17.99 oz
Dimension 155.60 x 86.80 x 37.00mm

Product Highlights

  • Brand: Teletec
  • 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 Teletec AK1 remote won't power on at all after sitting unused for several months — is the battery dead?

Extended storage drains Ni-MH cells well below operating voltage, and the remote's BMS will refuse to boot if it reads a pack below its minimum threshold. Connect the battery to the Teletec charger and leave it for at least 30 minutes before attempting to power on the remote — this gives the charger time to recover cells from deep-storage voltage. If the pack accepts charge and resting voltage climbs above 9V, the remote should boot normally. If the pack stays flat after 60 minutes on charge, the cells have self-discharged past recovery and need replacing.

The crane remote cuts out mid-operation every time I trigger a lift command — new battery fitted yesterday.

Lift solenoids and contactors draw a sharp inrush current at the moment of activation, and if the new pack wasn't fully charged before use, that current spike can pull pack voltage below the remote's BMS cutoff. The remote interprets that momentary sag as a dead battery and shuts off. Take the pack off the remote and run a complete charge cycle until the charger shows full — resting voltage should sit at 9.6V. If dropouts continue after a verified full charge, check that the battery contacts inside the remote are clean and making firm contact, since high resistance at the connector amplifies voltage sag under load.

E-stop response on the AK4 feels slower than it should — could the battery be causing this?

E-stop signal transmission and solenoid response time are voltage-dependent — a partially discharged pack operating at 8V instead of 9.6V reduces the current available to drive the safety relay, which extends the mechanical response delay. This matters most in safety-critical crane operations where every millisecond of E-stop latency counts. Charge the battery to full before any operational shift and verify resting voltage reads at least 9.4V before use. If voltage is confirmed full and latency is still abnormal, the issue is in the remote's relay circuit, not the battery.

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