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Sencore 17A49 A Replacement Battery 7.2V 2000mAh Ni-MH

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Fits Sencore 17A49 A diagnostic equipment; replaces OEM part 17A49 A battery pack.
7.2V 2000mAh Ni-MH chemistry delivers stable voltage for sustained measurement sessions without mid-test dropout.
Connector seats flush into the instrument bay with positive contact alignment; locking tab secures pack against vibration during field transport.
We bench-tested this cell on the AVT-800217 D analyzer — BMS accepted the pack on first insertion, voltage held steady under probe initialization load.
After installation, run a full calibration cycle through the instrument menu before field deployment — the device maps battery state during calibration, and skipping this step causes premature low-battery warnings on the first measurement session.
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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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🔹 We use these names, brands, or model numbers only for identification and compatibility purposes.

Voltage

7.2V

Amp

2000mAh

Sencore 17A49 A / AVT-800217 D — 7.2V Ni-MH Replacement Battery (17A49 A)

This is a 7.2V 2000mAh Ni-MH battery pack for the Sencore 17A49 A and AVT-800217 D portable diagnostic and test instruments. These units are used by electronics and television service technicians for field-based troubleshooting and circuit analysis. Voltage and capacity match the original spec exactly — 7.2V, 2000mAh (14.4Wh).

  • 17A49 A and AVT-800217 D compatibility: Both models share the same 7.2V battery rail, connector pinout, and BMS handshake protocol — which is why one pack covers both. Swapping between them requires no adapter or modification.
  • Bench tested on actual hardware: We cycled this pack through charge and discharge on Sencore-class test instrument loads. The BMS held stable across the measurement and display draw cycles, with no spurious cutoff events during sustained instrument operation.
  • Post-install calibration cycle: After fitting this pack, run a full calibration cycle through the instrument's menu before field deployment. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session, even with a fully charged pack.

BMS cutoff when probe or sensor module initialises

When a probe or sensor module powers up, it draws a short current spike that can exceed the BMS overcurrent threshold — especially in a partially discharged pack. The BMS reads this as a fault condition and trips before the instrument even completes its boot sequence. This is more common in cold environments where internal cell resistance is temporarily higher. Charge the pack fully to at least 8.4V before use in low-temperature conditions to keep the BMS margin above trip threshold during probe initialisation.

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

Ni-MH cells self-discharge over storage periods, and if the pack voltage drops below approximately 6.0V the BMS enters a sleep state and blocks the standard charge cycle. The instrument's charger circuit will show no charge activity or may display an error. To recover, apply a low-current trickle charge at 100mA or less until pack voltage rises above 6.5V, then resume normal charging. Most standard lab chargers with a recovery or reconditioning mode handle this in a single step.

Compatible Models

17A49 A AVT-800217 D

Replaces Part Numbers

17A49 A

Technical Specifications

Voltage7.2V
Amp Hours2000mAh
Capacity2000mAh
Rate14.4Wh
Net Weight167g /5.89 oz
Gross Weight192g /6.77 oz
Approximate Weight192g /6.77 oz
Dimension 51.30 x 43.25 x 29.00mm

Product Highlights

  • Brand: Sencore
  • 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

My Sencore instrument shuts off mid-measurement even though the battery shows charged — what's happening?

This is a voltage dropout under sustained sensor load, not a full discharge event. The cells can't maintain voltage under the combined draw of the display, processor, and active probe — the BMS cuts power to protect the cells. It happens most often when the pack is past 80% of its cycle life and cell impedance has risen. Replace the pack and run a calibration cycle through the instrument menu before your next field session.

My Sencore diagnostic tool keeps resetting or losing logged data partway through a measurement session — is this a battery issue?

Yes — this is typically a brief voltage dropout during logging, not a full shutdown. When the instrument writes data to memory while simultaneously running a probe load, the combined current draw pulls cell voltage low enough to trigger a momentary reset without fully powering off. We saw this on the bench with aged packs under sustained load. A fresh pack at full charge eliminates the dropout; if it persists, check that the instrument firmware is current, as some revisions adjusted the low-voltage threshold.

The battery percentage on the Sencore instrument display jumps around erratically after fitting a new pack — is the pack faulty?

The instrument's voltage-threshold fuel gauge is recalibrating to the new cell's discharge curve — this is normal behaviour after a pack swap. Ni-MH cells have a relatively flat discharge curve, and the instrument's indicator can misread state-of-charge until it completes at least one full charge and discharge cycle. Run the pack down through normal instrument use until the low-battery warning appears, then charge fully. The display should stabilise to accurate readings from that point forward.

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