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Tektronix TFS3031 LP43SC12S1P Replacement Battery 14.4V

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From $45.99 USD $56.99
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Fits Tektronix TFS3031 field survey instruments; replaces OEM part LP43SC12S1P and 146-0112-00.
14.4V 3000mAh Ni-MH delivers sustained current draw during sensor initialization and multi-point field measurements without voltage sag.
Connector seats into the battery door slot with a positive lead alignment tab; locking tab secures pack flush against the housing.
We bench-tested this cell under probe power-up cycling and confirmed the BMS passes peak initialization current without cutoff events.
Before deploying to the field, run the instrument's built-in battery calibration routine in the settings menu — this maps cell voltage profile to the display indicator and prevents false low-battery warnings during the first logging 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

14.4V

Amp

3000mAh

Tektronix TFS3031 / 965 Series — 14.4V Ni-MH Replacement Battery (LP43SC12S1P)

This is a 14.4V 3000mAh Ni-MH battery for the Tektronix TFS3031, 965, and DSP 78-8097-5058-7 field survey instruments. It replaces OEM part numbers LP43SC12S1P and 146-0112-00. The pack restores untethered operation during on-site telecommunications and network testing.

  • TFS3031 and 965 platform fit: These models share the same 14.4V power rail, physical form factor, and BMS handshake protocol — one pack covers the full group without modification.
  • Bench tested on actual hardware: We cycled the pack through the TFS3031's probe initialisation sequence, where inrush current spikes sharply at sensor power-up. The BMS held the rail stable and did not trip into protection mode across repeated cold starts.
  • Calibration cycle before first field deployment: After installing this pack, run a full calibration cycle through the instrument menu before heading to site. The TFS3031 maps battery state during calibration — skipping it causes the low-battery warning to trigger prematurely on the first measurement session, even with a fully charged pack.

BMS cutoff during probe module initialisation on the TFS3031

When the TFS3031 powers up a probe or active sensor module, current draw spikes sharply for 200–400ms before settling to steady-state load. An aged or deeply discharged pack cannot hold the voltage rail through that spike, and the BMS reads it as a fault condition and cuts output. This pack's cells are matched to handle that inrush without triggering protection. If the instrument still shuts down at probe power-up after installing a new battery, confirm the pack is charged above 15.8V before attempting the sequence.

Instrument not recognising new pack after months in storage

Ni-MH packs that sit unused for several months self-discharge below the BMS recovery threshold — the protection circuit enters sleep mode and the instrument sees no battery at all. To recover, connect the charger and leave it for a full charge cycle without interrupting; the BMS needs a sustained low-current input to exit sleep mode before normal charging begins. If the charger LED does not respond within 30 minutes, disconnect, wait 5 minutes, then reconnect — this resets the charger handshake. The pack should respond once cell voltage climbs above approximately 10V.

Compatible Models

TFS3031 965 DSP 78-8097-5058-7

Replaces Part Numbers

LP43SC12S1P 146-0112-00

Technical Specifications

Voltage14.4V
Amp Hours3000mAh
Capacity3000mAh
Rate43.2Wh
Net Weight651g /22.96 oz
Gross Weight831g /29.31 oz
Approximate Weight831g /29.31 oz
Dimension 134.55 x 45.00 x 44.87mm

Product Highlights

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

Frequently Asked Questions

My TFS3031 shuts off mid-measurement even though the battery indicator was showing half charge — what's happening?

Voltage dropout under sustained sensor load is the most common cause. The TFS3031's indicator reads resting cell voltage, but under continuous measurement load the pack can sag below the instrument's cutoff threshold before the display catches up. This is common with aged Ni-MH cells where internal resistance has increased. Replace the pack and run the instrument's calibration cycle before field use so the indicator recalibrates to the new cells.

Logged data resets or readings drift partway through a recording session — is this a battery issue?

Yes, this is distinct from a full shutdown. Intermittent voltage sag during a long logging session can cause the instrument's processor to brown out briefly, which resets the active measurement buffer without fully powering off the display. The fix is not a settings change — the pack's cells can no longer sustain the load across a full session. A new pack running the calibration cycle through the instrument menu will re-establish a stable voltage baseline before you return to site.

The TFS3031 powers on fine but cuts out immediately when I start a USB data transfer to a PC — what causes that?

USB transfer adds a second simultaneous load on top of the instrument's active processor draw, and the combined current pull exceeds what a weak pack can deliver without the voltage rail collapsing. The BMS trips to protect the cells and the instrument loses power. This happens even if the battery reads as charged, because the cells can't hold voltage under the combined draw. Charge the replacement pack fully — confirmed by a charger green light or a resting pack voltage above 16V — before attempting the transfer.

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