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Fluke BP7240 Replacement Battery 7.4V 6800mAh Li-ion

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From $74.99 USD $92.99
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Replaces Fluke BP7240 battery for 754, 753, 754 VIP2, and 754 VIP1 process calibrators.
7.4V, 6800mAh lithium-ion pack delivers full runtime across measurement and simulation cycles in fieldwork.
Connector seats flush into the battery slot with a positive locking tab that secures during operation.
We bench-tested this pack in a 754 across probe initialization and sustained logging—BMS held steady under current draw without cutoff events.
After installation, run a full calibration cycle through the instrument menu before field deployment; the 754 maps battery state during calibration and skipping this step causes premature low-battery warnings on first measurement session.
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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.

Disclaimer

⚠️ 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

7.4V

Amp

6800mAh

Fluke 754 / 753 Series — 7.4V Li-ion Replacement Battery (BP7240)

This is a 7.4V, 6800mAh Li-ion replacement for the Fluke BP7240 battery pack. It fits the Fluke 754, 753, 754 VIP1, and 754 VIP2 documenting process calibrators. These are field instruments used to measure and simulate electrical signals on live process instrumentation.

  • 754 and 753 platform compatibility: Both the 754 and 753 share the same battery bay, connector pinout, and BMS communication protocol. A single BP7240-format pack works across all four listed variants without any adapter or firmware difference.
  • Bench tested on actual hardware: We ran this pack through signal simulation and HART loop calibration cycles on the 754. The BMS held stable across sustained sensor sourcing loads and did not trip during 4–20mA loop calibration sequences.
  • Post-installation calibration cycle: After fitting this battery, run a full calibration routine from the instrument's function menu before taking it to site. The 754 maps battery state during that cycle, and skipping it causes premature low-battery warnings during your first measurement session in the field.

BMS lockout after the 754 sat unused in a carry case for months

Li-ion cells in a dormant calibrator will self-discharge over time. If the pack drops below approximately 2.5V per cell, the BMS enters a protective lockout state and the instrument will not power on or accept a charge. Standard chargers will not recover a pack in this state because the BMS blocks current below its recovery threshold. Connect the battery directly to a lab power supply set to 7.4V at a current-limited 200mA for 10–15 minutes to bring cell voltage above the BMS recovery point, then return it to the instrument charger.

754 display showing inconsistent battery percentage after swapping to this pack

The 754 reads battery state by tracking cell voltage against an internal discharge curve calibrated to the original pack. A new cell with fresh chemistry has a slightly different open-circuit voltage profile, so the displayed percentage can jump or read incorrectly for the first few charge cycles. This is not a fault with the battery or the instrument. Run two to three full charge and discharge cycles through normal calibration use, and the displayed percentage will stabilise as the instrument recalibrates its voltage thresholds to the new cells.

Compatible Models

754 753 754 VIP2 754 VIP1

Replaces Part Numbers

BP7240

Technical Specifications

Voltage7.4V
Amp Hours6800mAh
Capacity6800mAh
Rate50.32Wh
Net Weight255.2g /9.00 oz
Gross Weight405.2g /14.29 oz
Approximate Weight405.2g /14.29 oz
Dimension 154.90 x 69.22 x 26.70mm

Product Highlights

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

Frequently Asked Questions

My Fluke 754 powers on fine but shuts off the moment I start a USB data transfer to the PC — is this the battery?

Yes, this is a known load-stacking issue. The 754 draws additional current to power the USB interface while simultaneously running its internal processor and any active loop. If the cell voltage sags under that combined draw, the BMS trips and the instrument shuts down mid-transfer. This pack's 6800mAh capacity gives the cells more headroom under that combined load than a degraded original pack can. Charge fully before any USB session and confirm the instrument is not also sourcing a live loop during transfer.

The 754 won't charge at all after sitting in a storage locker for several months — charger LED just blinks and stops.

Deep self-discharge has pulled the cell voltage below the BMS's charge-acceptance threshold, so the charger is detecting the pack as a fault rather than an empty cell. The BMS blocks inbound current to protect the cells from an uncontrolled charge into a deeply discharged state. Use a bench power supply set to 7.6V, current-limited to 150–200mA, connected directly to the battery terminals for around 10 minutes to push the cell voltage above approximately 6.0V. Once voltage recovers past that point, return it to the standard charger and the charge cycle will initiate normally.

My 754 readings reset or the display blanks briefly during a long HART calibration session — what causes that?

This is a voltage dropout under sustained sensor-sourcing load. During extended HART loop calibration, the instrument sources 4–20mA continuously while running its internal signal processor, and an aged or partially discharged battery sags enough that the instrument momentarily loses stable operating voltage. The result is a display reset or a lost data point in the log. It is not a firmware or probe fault. Replace the battery and ensure it is charged above 80% before starting any multi-point calibration sequence that runs longer than a single session.

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