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EXFO MAX-600 Replacement Battery 3.7V 10000mAh GP-2147

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From $48.99 USD $60.99
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Fits EXFO MAX-600, MAX-605, MAX-610, MAX-625 optical power meters; replaces OEM part GP-2147 and 01WQ0037-03.
3.7V, 10000mAh Li-Polymer cell delivers sustained power for field fiber optic measurements without mid-session voltage sag.
Proprietary connector mates flush into battery slot with spring-clip retention; no adapter required on MAX series instruments.
We bench-tested load profiles matching probe initialization and sustained logging; BMS held steady across thermal cycling without nuisance cutoff.
After installation, run full calibration through the MAX-600 menu before field deployment—the instrument maps battery state during calibration and skipping this step causes 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.

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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

10000mAh

EXFO MAX-600 Series — 3.7V Li-Polymer Replacement Battery (GP-2147)

This 3.7V, 10000mAh Li-Polymer pack replaces the original battery in the EXFO MAX-600, MAX-605, MAX-610, and MAX-625 optical power meters and light source instruments. It matches the OEM cell dimensions (79.60 × 65.80 × 15.10mm) and the BMS profile the instrument firmware expects. Capacity figure is from the product specification sheet — 37Wh total.

  • MAX-600 series platform fit: The MAX-600, MAX-605, MAX-610, and MAX-625 share the same battery bay geometry, connector pinout, and BMS communication protocol. One pack covers all four variants because EXFO standardised the power architecture across this instrument family.
  • Bench tested on actual hardware: We cycled this pack under sustained optical source load and monitored the BMS handshake through charge and discharge. The protection circuit responded correctly to over-current at probe initialisation and held stable voltage through continuous measurement sessions.
  • First-use calibration on the MAX-600: After installing the new pack, run a full calibration cycle through the instrument menu before field deployment. The MAX-600 maps battery state during calibration — skipping this step causes the low-battery warning to trigger early on the first measurement session, even with a full charge.

BMS lockout after the MAX-600 sat unused in a carry case for months

Li-Polymer cells self-discharge slowly in storage. If the pack drops below roughly 2.5V per cell, the BMS enters a protection lockout and the instrument will not power on — it draws nothing and shows no charging indicator. Recovery requires applying charge at a low pre-charge rate to bring the cell voltage back above the BMS wake threshold. Use the original EXFO charger or a lab supply set to 3.7V at 500mA and hold it connected for at least 30 minutes before attempting normal charging.

Voltage dropout causing readings to reset mid-logging session

During a long logging session, the optical source and detector run simultaneously, pulling sustained current that can expose any internal resistance in an aged or cold cell. A momentary voltage sag at that combined load trips the instrument's under-voltage protection, resetting the active log. This is not a firmware fault — it is the BMS responding to a real dropout. Check the battery voltage reading in the instrument diagnostics menu; anything below 3.5V under load confirms the pack needs replacement. A new pack at full charge holds above 3.6V through sustained dual-port draw.

Compatible Models

MAX-600 MAX-605 MAX-610 MAX-625 MAX-630G MAX-635G MAX-630 MAX-635

Replaces Part Numbers

GP-2147 01WQ0037-03

Technical Specifications

Voltage3.7V
Amp Hours10000mAh
Capacity10000mAh
Rate37Wh
Net Weight185g /6.53 oz
Gross Weight235g /8.29 oz
Approximate Weight235g /8.29 oz
Dimension 79.60 x 65.80 x 15.10mm

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 MAX-600 powers on fine but shuts off the moment I start a USB data transfer to my laptop — is this a port fault?

It is not a port fault. USB transfer adds a combined draw from the data bus and the active optical modules simultaneously, and an aged or partially discharged pack sags enough to trip the BMS under that load. We saw the same behaviour on the bench with a depleted cell — the instrument cut out within seconds of initiating sync. Charge the new pack fully first, then confirm the battery voltage in the instrument diagnostics menu reads above 3.65V before connecting USB.

The MAX-600 won't take a charge after sitting in storage for several months — the charging indicator never appears.

The BMS has entered deep-discharge lockout. When the cell voltage drops below the protection threshold during storage, the circuit blocks charge input entirely to prevent cell damage, and the instrument gives no response. Connect the original EXFO charger and leave it for 30–45 minutes without interruption — the BMS needs sustained low-current input to cross the recovery threshold before it switches to normal charge mode. If the indicator still does not appear after 45 minutes, check the charger output voltage at the connector; it should read 4.2V.

After fitting the new pack, the MAX-600 is showing a low-battery warning almost immediately even though I just charged it fully.

The instrument recalibrates its battery state map from the cell voltage profile it reads during first use. If you skipped the calibration cycle in the instrument menu after installing the pack, the firmware is still reading state-of-charge thresholds mapped to the old, degraded cell — so it flags low battery too early. Go into the instrument menu, run a full calibration cycle, then allow one complete charge-to-discharge cycle. After that, the percentage indicator tracks the new cell correctly.

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