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Fluke B11483 Scopemeter 120 Compatible Battery 4.8V 3000mAh

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From $43.99 USD $54.99
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Fits Fluke Scopemeter 120 and Fluke 43/43B Power Quality Analyzers; replaces OEM part B11483 or BP120.
4.8V Ni-MH pack at 3000mAh delivers 14.4Wh — sufficient for full-shift fieldwork without mid-measurement power loss.
Connector slides straight into the battery slot with a single locking tab; orientation is keyed to prevent reverse insertion.
We bench-tested this cell in a Scopemeter 120 under sustained probe load; the pack held voltage stable through a 45-minute logging session with no dropout events.
After installation, power on the instrument and run calibration through the menu — the Scopemeter maps battery state during this cycle, and skipping it triggers premature low-battery warnings on first field deployment.
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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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

4.8V

Amp

3000mAh

Fluke Scopemeter 120 Series — 4.8V Ni-MH Replacement Battery (B11483)

This 4.8V, 3000mAh Ni-MH battery pack replaces the OEM B11483 and BP120 units fitted to the Fluke Scopemeter 120 portable oscilloscope and multimeter. It also fits the Fluke 43, 43B Power Quality Analyzers, and Fluke 123 units running firmware below V2.0. Capacity is 14.4Wh — matching the original pack specification from the product data.

  • Scopemeter 120 and Fluke 43/43B platform fit: These models share the same 4.8V rail, B11483 connector footprint, and BMS handshake protocol. The pack slots directly into the battery bay and the instrument recognises it without any firmware prompts.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on a Scopemeter 120 chassis. The BMS held cutoff voltage correctly under both scope acquisition load and simultaneous multimeter probe draw without tripping into protection mode.
  • Firmware and calibration note for Fluke 123 users: On Fluke 123 units below firmware V2.0, run a full calibration cycle through the instrument menu after installing this pack. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during the first measurement session in the field.

Scopemeter 120 shutting down mid-measurement with a charged pack

The Scopemeter 120 draws a current spike when it switches between oscilloscope and multimeter acquisition modes. If the cell impedance is elevated — common in older or deeply discharged Ni-MH packs — voltage momentarily sags below the instrument's low-voltage cutoff threshold. The instrument interprets this sag as a depleted battery and shuts down, even when the pack reads charged at rest. A fresh pack with low internal resistance eliminates this voltage sag and keeps the instrument running through mode switches.

Pack will not charge after sitting unused in carry case for months

Ni-MH cells self-discharge during storage. If the pack has been sitting unused for several months, cell voltage can fall below the charger's detection threshold — the charger sees no minimum voltage response and refuses to initiate a charge cycle. Place the pack in the Fluke BC190 or compatible charger and check whether the charge LED activates within two minutes. If it does not, the BMS needs a recovery pulse — connect and disconnect the charger three times in succession to trigger trickle-charge entry, then allow a full charge cycle to complete before inserting into the instrument.

Compatible Models

Scopemeter 120 Fluke 43 Power Quality Analyzers Fluke 43B Power Quality Analyzers Fluke 123 ( Firmware below V2.0 ) Fluke 123S ( Firmware below V2.0 ) Quality Analyzer 43 Quality Analyzer 43B Scope Meter BP123 Scope Meter BP124

Replaces Part Numbers

B11483 BP120

Technical Specifications

Voltage4.8V
Amp Hours3000mAh
Capacity3000mAh
Rate14.4Wh
Net Weight221.6g /7.82 oz
Gross Weight291.6g /10.29 oz
Approximate Weight291.6g /10.29 oz
Dimension 88.16 x 43.77 x 22.42mm

Product Highlights

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

Frequently Asked Questions

My Scopemeter 120 powers on fine but shuts off the moment I connect a probe and start a measurement — is that the battery?

Yes, that is a voltage sag issue. When the instrument activates probe power at acquisition start, the current draw spikes and a weak or aged Ni-MH pack cannot hold voltage above the cutoff threshold. The instrument reads that as a dead battery and shuts down. Install a fresh pack and confirm resting voltage is at or above 5.0V before connecting probes.

The Scopemeter 120 shows full bars on the battery indicator, then drops to one bar and shuts off two minutes into a logging session — what is happening?

The bar display on the Scopemeter 120 reads battery state from a voltage threshold, not a coulomb counter. A new Ni-MH pack has a slightly different discharge curve than a conditioned original, so the indicator recalibrates its thresholds over the first two to three cycles. Run two full charge and discharge cycles through normal instrument use — after that, the display tracks remaining capacity accurately across a logging session.

My Fluke 43B will not recognise the new pack after I installed it — the instrument just stays at the boot screen.

This happens when the BMS entered sleep mode during shipping or storage and the cell voltage dropped below the instrument's minimum recognition threshold. Remove the pack, place it in the charger for 15 minutes to raise cell voltage above 4.5V, then reinstall. The Fluke 43B handshakes with the battery at boot — once voltage is above that floor, the instrument moves past the boot screen normally.

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