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HITARGET BT10 Replacement Battery 6V 3600mAh Ni-MH

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From $51.99 USD $63.99
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Fits HITARGET BT10 and BT20 battery slots on survey and measurement instruments.
6V, 3600mAh Ni-MH pack delivers sustained voltage under continuous sensor load without mid-cycle dropout.
Connector slides straight into instrument bay with positive tab forward — locking notch prevents accidental ejection.
We tested this cell on a full measurement cycle with probe initialization — BMS accepted the pack without fault lockout.
After installation, run the instrument's full calibration routine before field deployment — this maps the new pack voltage and prevents false low-battery warnings during your 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.

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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

6V

Amp

3600mAh

HITARGET BT10 / BT20 — 6V Ni-MH Replacement Battery

This is a 6V, 3600mAh Ni-MH replacement battery for HITARGET survey and measurement instruments. It fits units that use the BT10 or BT20 pack. The 21.6Wh capacity supports extended field sessions between charges.

  • BT10 and BT20 cross-compatibility: Both part numbers share the same 6V cell configuration, connector pinout, and BMS handshake protocol. HITARGET instruments that accept either OEM pack will accept this replacement without modification.
  • Bench tested on actual hardware: We cycled this pack under simulated sensor-load draw and monitored BMS response at probe initialisation. The BMS held steady through the start-up current spike without tripping into protection mode.
  • First-use calibration cycle: After installing, run a full calibration cycle through the instrument menu before field deployment. The instrument maps battery state during calibration — skipping this step causes premature low-battery warnings on your first measurement session.

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

Ni-MH cells self-discharge during storage. If the pack drops below roughly 4.8V total across cells, the BMS can enter a low-voltage lockout state and refuse to accept a charge signal. This happens because the protection circuit treats deep-discharged cells as a fault condition. To recover, place the pack on a Ni-MH charger that supports a trickle pre-charge — most quality chargers apply a low 100–200mA recovery current until cell voltage climbs above the BMS acceptance threshold, typically around 5.4V, before switching to normal charge rate.

Readings drifting or logging session resetting mid-measurement

Sustained sensor load — particularly when multiple probes or modules are active simultaneously — draws more current than idle display operation. If cell impedance has risen due to age or storage, voltage sags under this load and the instrument interprets the drop as a low-battery condition, triggering a save-and-reset cycle mid-log. A fresh pack with low internal resistance holds voltage steady under the combined draw. If dropouts persist after installing a new pack, check that the battery contacts in the instrument bay are clean and making full contact — oxidised contacts add resistance and replicate the same voltage sag symptom.

Replaces Part Numbers

BT10 BT20

Technical Specifications

Voltage6V
Amp Hours3600mAh
Capacity3600mAh
Rate21.6Wh
Net Weight332.1g /11.71 oz
Gross Weight402.1g /14.18 oz
Approximate Weight402.1g /14.18 oz
Dimension 88.75 x 46.53 x 38.02mm

Product Highlights

  • Brand: HITARGET
  • 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 HITARGET instrument powers on fine but shuts itself down the moment I connect the USB cable to transfer data to my PC — is the battery causing this?

Yes — USB data transfer adds a second draw on top of the active display and any sensor load, and an ageing or deeply discharged Ni-MH pack can't hold voltage under the combined current. The instrument hits its low-voltage threshold and cuts out to protect the log data. Install a freshly charged pack, confirm the battery contacts in the bay are clean, then initiate the transfer. If the pack is new, run the instrument's calibration cycle first so the voltage indicator is accurately mapped before you attempt the transfer.

The instrument shows a full battery indicator right after charging, but within the first few minutes of a measurement session it jumps straight to a low-battery warning — what's happening?

This is a voltage-threshold recalibration issue. Ni-MH cells have a relatively flat discharge curve, and the instrument's low-battery indicator is triggered by a specific voltage threshold. A new pack — or one returning from storage — hasn't been mapped yet, so the instrument's indicator overshoots at the top and trips the warning early. Run a full calibration cycle through the instrument menu after the first charge. This lets the instrument re-anchor its threshold to the actual resting voltage of the new cells, and the spurious early warnings will stop.

The pack won't take a charge at all after sitting in storage — the charger LED either stays green immediately or flashes an error — how do I get it to charge?

Extended storage has likely dropped cell voltage below the BMS acceptance threshold, and the charger is seeing the pack as already full or as a fault. Use a Ni-MH charger with a trickle or recovery pre-charge mode — it applies around 100–200mA to bring cell voltage up gradually. Once the total pack voltage climbs above approximately 5.4V, the BMS releases and the charger switches to its normal Ni-MH charge rate. If your current charger lacks a recovery mode, a universal charger with a manual Ni-MH 0.1C trickle setting will achieve the same result.

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