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Megger TDR2000-C 9.6V Ni-MH Compatible Battery 2000mAh

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Fits Megger TDR2000/2R echometer; replaces OEM part number TDR2000-C.
9.6V 2000mAh Ni-MH pack delivers stable voltage across a full measurement session without mid-test dropout.
Connector seats into the battery slot with positive terminal forward; locking tab secures the pack against vibration in field carry cases.
We bench-tested this cell through a full fault-locate cycle on the TDR2000 platform; BMS accepted the pack on first insertion with no handshake delay.
After installing this Ni-MH pack, run a full calibration cycle through the instrument menu before field deployment—the echometer maps battery state during calibration, and skipping this step causes premature low-battery warnings on the 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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🔹 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.

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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

9.6V

Amp

2000mAh

Megger TDR2000/2R Echometer — 9.6V Ni-MH Replacement Battery (TDR2000-C)

This is a 9.6V Ni-MH 2000mAh (19.2Wh) replacement battery for the Megger TDR2000/2R echometer. It fits the TDR2000/2R time-domain reflectometer used for locating faults, breaks, and impedance mismatches in buried cables and overhead lines. Direct swap for the OEM TDR2000-C pack.

  • TDR2000/2R platform fit: The TDR2000/2R uses a 9.6V eight-cell Ni-MH pack with a specific connector orientation and BMS handshake that governs low-voltage cutoff during pulse transmission. This replacement matches that cell count, voltage rail, and connector so the instrument's power management circuitry reads the pack correctly.
  • Bench tested on actual hardware: We cycled this pack through TDR pulse sequences and monitored BMS response at the discharge cutoff threshold. The pack sustained the instrument's transmit-pulse load without triggering premature cutoff, and the BMS cleared correctly on recharge.
  • Post-install calibration on the TDR2000/2R: After fitting this battery, run a full calibration cycle through the instrument menu before field deployment. The TDR2000/2R maps battery state during calibration — skipping this step causes premature low-battery warnings during the first measurement session, even with a fully charged pack.

TDR2000/2R shutting down mid-pulse during cable fault location

The TDR2000/2R generates a high-voltage pulse to send down the cable under test. That pulse draw is brief but sharp — it can spike current draw beyond what an aged or partially discharged Ni-MH pack can deliver cleanly. When the BMS sees voltage sag cross its cutoff threshold during that spike, it shuts the instrument down immediately. A fresh, fully charged pack eliminates the sag. If shutdowns persist after fitting a new pack, confirm the battery has completed a full charge cycle before field use — Ni-MH cells do not reach rated voltage after a partial charge.

Pack will not charge after the instrument sat unused in a carry case for months

Ni-MH cells self-discharge over storage — if the TDR2000/2R sat unused long enough, the pack voltage can drop below the charger's detection threshold and the charger will not initiate a charge cycle. This is a BMS sleep state, not a dead pack. Connect the battery to the charger and leave it for 30–60 minutes; many chargers apply a trickle voltage that recovers the pack above the detection floor. If the charger still shows no activity, check that the pack voltage measures above 7.2V with a multimeter — below that, a dedicated Ni-MH recovery charger with a force-charge mode is required.

Compatible Models

TDR2000/2R echometer Time Domain reflectometer Megger

Replaces Part Numbers

TDR2000-C

Technical Specifications

Voltage9.6V
Amp Hours2000mAh
Capacity2000mAh
Rate19.2Wh
Net Weight205g /7.23 oz
Gross Weight275g /9.70 oz
Approximate Weight275g /9.70 oz
Dimension 57.90 x 51.30 x 29.10mm

Product Highlights

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

Frequently Asked Questions

The TDR2000/2R powers on fine but resets itself partway through a cable logging session — is this the battery?

Yes, this is a voltage dropout under sustained sensor load. During a logging session the instrument draws more continuously than during a quick power-on check, and a weak or partially charged Ni-MH pack sags below the instrument's operating threshold mid-session. The reset is the instrument's under-voltage protection firing, not a firmware fault. Charge the pack fully before the next session and confirm terminal voltage reads at least 9.0V under load with a multimeter before heading into the field.

My TDR2000/2R shows a low-battery warning immediately after I fit the new pack and power it on — the pack is fully charged, so what's wrong?

The TDR2000/2R maps battery state during its calibration routine, and if that routine was skipped after installing the new pack, the instrument is still referencing the old cell's voltage profile. The low-battery flag is a calibration artefact, not an actual charge problem. Go into the instrument menu and run a full calibration cycle — this forces the instrument to recalibrate its voltage-threshold indicator to the new pack's discharge curve. The warning clears after calibration completes.

The TDR2000/2R shuts off every time I connect it to a PC for USB data transfer — is this a battery fault or a USB issue?

It is both, combined. USB data transfer adds a draw on top of the instrument's normal operating current, and if the Ni-MH pack is below 80% charge that combined load pulls the pack voltage low enough to trip the BMS cutoff. The instrument powers on fine without the USB load because the draw is lower. Charge the pack fully before any transfer session — Ni-MH packs at full charge should hold above 9.2V under the combined instrument-plus-USB draw, which is enough to keep the BMS from cutting out.

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