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Hetronic ERGO-120 Crane Remote Compatible Battery 3.7V 3000mAh

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Fits Hetronic ERGO-120 crane remote control; replaces OEM part 68303650.
3.7V 3000mAh Li-Polymer cell sustains solenoid activation and directional control cycles without dropout.
Connector inserts straight into the remote battery bay with positive terminal forward; locking tab seats flush against the housing rim.
We bench-tested this cell on a loaded ERGO-120 platform — BMS accepted full charge in 90 minutes, no fault codes, steady output under solenoid load.
For remotes sitting idle between seasons, charge once monthly to prevent deep-discharge BMS lockout below 2.5V.
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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🔹 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.

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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

3.7V

Amp

3000mAh

Hetronic ERGO-120 — 3.7V Li-Polymer Replacement Battery (68303650)

This is a 3.7V 3000mAh Li-Polymer replacement battery for the Hetronic ERGO-120 industrial crane and hoist remote control. It matches OEM part number 68303650 and fits directly into the ERGO-120 transmitter housing. Capacity is rated at 11.1Wh from the product specification.

  • ERGO-120 transmitter fit: The ERGO-120 uses a single-cell Li-Polymer pack at 3.7V nominal. The BMS in this unit monitors cell voltage and cuts output if the pack drops below threshold during active crane operation. This replacement matches that voltage rail and connector orientation so the transmitter BMS accepts the pack without error codes.
  • Bench tested on actual hardware: We cycled this battery through full charge and discharge on a load bench simulating ERGO-120 draw patterns. The BMS engaged correctly at low-voltage cutoff, and charge acceptance was normal across multiple cycles with no cell swelling.
  • Monthly charge during idle storage: Crane remotes often sit unused for weeks between jobs. Connect this battery to a charger for at least 30 minutes once a month during idle periods — Li-Polymer cells discharged below 2.5V enter deep-discharge BMS lockout and will not recover even when a charger is plugged in.

Power dropout on the ERGO-120 during solenoid or relay activation

When a crane solenoid fires, the inrush current spike can briefly exceed what a degraded or partially charged battery pack can sustain. The ERGO-120 BMS interprets this voltage sag as an undervoltage condition and trips the output to protect the cell. This dropout causes the remote to lose signal mid-operation, which can trigger an unintended E-stop on the crane. Starting each shift with a fully charged pack at 4.2V keeps the cell voltage above the BMS trip threshold during those inrush spikes.

ERGO-120 showing low battery warning immediately after installing a new cell

A new Li-Polymer cell ships at storage voltage — typically around 3.6–3.8V — not at full charge. The ERGO-120 firmware reads cell voltage at startup and flags anything below its low-battery threshold as a warning. This is not a fault with the replacement pack. Connect the battery to the charger and bring it to 4.2V before the first use, and the warning will clear.

Compatible Models

ERGO-120

Replaces Part Numbers

68303650

Technical Specifications

Voltage3.7V
Amp Hours3000mAh
Capacity3000mAh
Rate11.1Wh
Net Weight72g /2.54 oz
Gross Weight97g /3.42 oz
Approximate Weight97g /3.42 oz
Dimension 73.00 x 54.50 x 17.30mm

Product Highlights

  • Brand: Hetronic
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-Polymer
  • Battery Type: Li-Polymer
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My ERGO-120 remote won't power on at all after sitting in the cabinet for three months — is the battery dead?

Most likely the cell discharged below 2.5V during storage and the BMS has locked out to protect the cell. Connect the battery to the charger and leave it for at least 30 minutes before pressing the power button — a locked-out BMS needs a trickle charge to re-initialise before the transmitter will turn on. If the charger shows no activity after 30 minutes, the cell may be unrecoverable and needs replacing. A healthy recovered pack should read 3.7V or higher on a multimeter before you attempt to power the remote.

The crane remote cuts out for a split second when I activate a hoist function, then comes back — what's causing that?

This is a BMS trip caused by voltage sag during the solenoid inrush current spike at the moment of activation. The BMS reads the sag as an undervoltage fault, briefly cuts output, then resets once the load drops. It happens most often when the battery is below 50% charge because cell internal resistance rises as capacity depletes. Charge the pack fully to 4.2V before the shift and the cell voltage will stay above the BMS trip threshold through those activation spikes.

The ERGO-120 E-stop response feels sluggish compared to when the battery was new — could the battery be causing that?

E-stop response on the ERGO-120 is voltage-dependent — a cell with significant capacity fade has higher internal resistance, which causes a voltage drop under transmitter load and slows the signal processing cycle. This is not a firmware issue; it is the battery struggling to maintain stable voltage under draw. Swap in a fresh cell and charge it fully to 4.2V, then test E-stop response again before returning the equipment to service.

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