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EXFO EX1 Replacement Battery 3.7V 3400mAh GP-2268

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From $26.99 USD $33.99
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Fits EXFO EX1 optical testing equipment; replaces OEM part numbers GP-2268, 880X272, and 01WQ0037-09.
3.7V 3400mAh lithium-ion cell delivers 12.58Wh; sustains sensor and probe initialization current without premature shutdown.
Cylindrical form factor measures 68.10 x 18.90 x 18.90mm; slides into vertical slot with contact pins forward.
Bench testing showed stable voltage under sustained sensor load; BMS responded cleanly to probe power-up current spike without cutoff.
After installation, run the instrument's full calibration cycle from the menu before field deployment — skipping this causes false 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.

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.

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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

3400mAh

EXFO EX1 — 3.7V Li-ion Replacement Battery (GP-2268)

This 3.7V 3400mAh Li-ion battery replaces the GP-2268 pack in the EXFO EX1 portable fiber optic test instrument. It fits the EX1 directly, restoring field power for loss measurement, cable inspection, and network diagnostics. Voltage and capacity match the OEM specification exactly.

  • EX1 platform fit: The EX1 uses a single-cell 3.7V architecture with a BMS that authenticates voltage thresholds and monitors cell temperature during optical module power-up. This pack matches those thresholds, so the instrument does not flag a battery fault on boot or during probe initialisation.
  • Bench tested on actual hardware: We cycled this pack through EX1 power-on, optical source activation, and sustained loss-measurement logging. The BMS held stable through the initialisation current spike and did not trip during continuous instrument load.
  • Post-install calibration cycle: After fitting this pack, run a full calibration cycle from the EX1 instrument menu before heading into the field. The EX1 maps battery state during calibration — skipping this step causes the low-battery indicator to fire early on the first measurement session, even when the cell is fully charged.

BMS cutoff when the EX1 optical module powers up

The EX1 draws a short current spike the moment the optical source initialises. A degraded or deeply discharged cell cannot sustain voltage through that spike, and the BMS trips as a protection response. The instrument shuts off instantly — it does not show a low-battery warning first. Charge the pack to full before the first use and confirm resting voltage is at or above 3.7V before inserting it into the unit.

EX1 showing inconsistent battery percentage after a fresh install

The EX1 fuel gauge recalibrates to the new cell's voltage curve over the first charge-discharge cycle. Until that cycle completes, the percentage display may jump or read higher than expected at reboot. This is not a fault with the pack — the instrument is recalculating its threshold map against the new cell. Run one full charge to 4.2V, then discharge through a normal measurement session, and the indicator stabilises.

Compatible Models

EX1

Replaces Part Numbers

GP-2268 880X272 01WQ0037-09

Technical Specifications

Voltage3.7V
Amp Hours3400mAh
Capacity3400mAh
Rate12.58Wh
Net Weight49.6g /1.75 oz
Gross Weight74.6g /2.63 oz
Approximate Weight74.6g /2.63 oz
Dimension 68.10 x 18.90 x 18.90mm

Product Highlights

  • Brand: EXFO
  • Manufacturer: CS
  • Series: Standard
  • Color: Blue
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My EX1 won't charge after sitting in the carry case for several months — is the pack dead?

Most likely not dead, but the BMS has entered sleep mode after the cell voltage dropped below the recovery threshold during long storage. Plug the EX1 into the charger and leave it connected for at least 30 minutes without interruption — some chargers need sustained low-current contact to wake the BMS before fast-charge begins. If the charging indicator still does not appear after 30 minutes, disconnect, wait 60 seconds, and reconnect. Recovery charge should begin once cell voltage climbs back above 3.0V.

Measurement readings reset mid-session even though the battery indicator still looks fine — what's happening?

This is a voltage dropout under sustained sensor load, not a capacity problem. The cell cannot hold voltage flat during continuous optical source draw, so it dips below the instrument's operating threshold momentarily and triggers a reset — even though the percentage indicator had not caught up yet. Check that the pack contacts are clean and seated fully in the battery bay. If dropouts continue after a full recharge cycle, the cell is no longer holding voltage under load and the pack needs replacing.

The EX1 powers on normally but cuts out the moment I start a USB data transfer to my laptop — why?

USB data transfer adds a combined draw on top of whatever the optical module is running, and that total load can exceed what a partially discharged or worn cell can sustain. The BMS trips on the voltage sag and shuts the unit down. Charge the pack fully before any session that includes USB transfer, and confirm resting voltage is at or above 3.7V before connecting. If the cutout happens even with a fully charged pack, clean the USB port contacts on the EX1 — resistance at the connector increases the effective load and can push the draw past the BMS threshold.

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