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EXFO EX10 10G Ethernet Tester Compatible Battery 3.7V 12000mAh

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From $93.99 USD $115.99
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Fits EXFO EX10 10G Ethernet Tester, replaces OEM part 01WQ0037-19, 880X281, GP-2303.
3.7V, 12000mAh Li-Polymer cell delivers 44.4Wh for sustained field measurement sessions without mid-test power loss.
Connector seats into rear battery slot with positive contact alignment; locking tab secures pack flush against instrument housing.
Bench testing showed stable voltage delivery under probe initialization load; BMS accepted first charge cycle without cutoff events.
After installation, run the instrument's full calibration routine from the menu before field deployment — EX10 maps battery state during calibration and skips this step cause premature low-battery warnings on first measurement session.
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

3.7V

Amp

12000mAh

EXFO EX10 10G Ethernet Tester — 3.7V Li-Polymer Replacement Battery (01WQ0037-19)

This 3.7V, 12000mAh Li-Polymer battery replaces the OEM pack in the EXFO EX10 10G Ethernet Tester. It fits the EX10 platform directly, restoring full portable operation for field installation, troubleshooting, and maintenance work on high-speed Ethernet networks. Voltage and capacity match the original spec: 3.7V, 12000mAh (44.4Wh).

  • EX10 10G Ethernet Tester fit: The EX10 uses a single large-format Li-Polymer cell pack with a dedicated BMS that monitors cell voltage and current draw across active test ports. This battery matches the physical footprint (132.90 × 67.50 × 9.70mm), connector pinout, and communication protocol the EX10's power management circuit expects.
  • Bench tested on actual hardware: We ran this pack through power-up sequencing and sustained test-port activation on the EX10 platform. The BMS held stable across multi-port initialisation without triggering an overcurrent fault, and cell voltage remained consistent under the combined load of active RF and data processing tasks.
  • First-deployment calibration step: After installing this pack, run a full calibration cycle through the EX10 instrument menu before field deployment. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during the first live measurement session.

BMS lockout after the EX10 sat unused in a carry case for months

Li-Polymer cells self-discharge slowly in storage. If the EX10 was shelved with a partially depleted pack, the cell voltage can drop below the BMS recovery threshold — typically around 2.5V per cell — and the protection circuit latches off entirely. At that point, the instrument will not power on and the charger may show no activity. To recover, connect the EX10 to the OEM charger and leave it for 30–60 minutes without pressing the power button — the charger trickle-charges the cell back above the BMS re-initialisation threshold before normal charging begins.

EX10 shuts down mid-test when transferring logs to a PC via USB

USB data transfer adds a separate current draw on top of active test-port processing — on a degraded or partially charged pack, the combined load pulls cell voltage below the BMS cutoff threshold. The BMS trips to protect the cell and the instrument cuts out, often mid-transfer. This is not a firmware fault. Charge the pack to at least 3.9V per cell before starting a USB session, or transfer logs immediately after a full charge cycle before running further tests.

Compatible Models

EX10 10G Ethernet Tester

Replaces Part Numbers

01WQ0037-19 880X281 GP-2303

Technical Specifications

Voltage3.7V
Amp Hours12000mAh
Capacity12000mAh
Rate44.4Wh
Net Weight217g /7.65 oz
Gross Weight267g /9.42 oz
Approximate Weight267g /9.42 oz
Dimension 132.90 x 67.50 x 9.70mm

Product Highlights

  • Brand: EXFO
  • 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

The EX10 shows a healthy battery percentage, then shuts off instantly when I activate a test port — what's happening?

This is a voltage-sag fault. When the test port initialises, it draws a short current spike that pulls cell voltage below the BMS cutoff threshold, even if the display was showing a high percentage. The percentage reading is based on a resting voltage sample, which doesn't reflect how the cell behaves under load. Charge the pack fully and rerun the calibration cycle in the instrument menu — this forces the EX10 to resample the cell under load and recalibrate its cutoff logic.

My EX10 won't recognise the new battery at all — the instrument powers on but reports a battery error immediately after install.

The EX10's power management circuit checks for a valid BMS handshake on startup. If the replacement pack has been in storage, the BMS may be in a low-power sleep state and not responding to the handshake request. Connect the EX10 to the charger for at least 20 minutes before powering it on — this wakes the BMS and allows the instrument to complete its recognition sequence. If the error persists after charging, run the calibration cycle from the instrument menu to force a fresh state mapping.

Readings drift or reset partway through a logging session even though the battery indicator looks fine — is this the battery?

Yes, this is a voltage-dropout issue under sustained sensor load. During a long logging session, continuous data processing and port activity draw enough current to cause brief voltage dips that the display indicator doesn't capture between refresh cycles. Those dips interrupt the instrument's internal logic and cause reading resets. Ensure the pack is charged to at least 4.1V before starting an extended logging session, and avoid running USB transfer or additional port scans concurrently with active logging.

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