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Spectra Precision PR-655 Replacement Battery LHJBT-L11 3.7V

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Fits Spectra Precision PR-655, PR-670, PR-680, PR-680L rotary lasers; replaces OEM part LHJBT-L11.
3.7V 3300mAh lithium-ion cell delivers the steady power curve these laser levels need for sustained operation on full-day job sites without voltage sag mid-measurement.
Cylindrical cell with spring-contact terminals; slides into the PR-series battery slot and locks with the factory retention clip — no modifications needed.
We bench-tested this cell in a PR-680L under continuous laser and rotation mode; BMS stayed active through full discharge with no early cutoff or thermal shutdown.
After installing, power on the PR-655 and run a full calibration cycle through the instrument menu before field deployment — the laser 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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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.

Delivery and Shipping

🔹 Most orders ship the next day, and we use FedEx, UPS, Purolator and other carriers to get them to you. Lithium batteries have to ship by ground only, not air or USPS. Make sure your address is right before you order, because if we have to send it back, you pay for shipping again.

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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

3.7V

Amp

3300mAh

Spectra Precision PR-655 / PR-680 Series — 3.7V Li-ion Replacement Battery (LHJBT-L11)

This 3.7V 3300mAh Li-ion battery replaces the LHJBT-L11 pack in the Spectra Precision PR-655, PR-670, PR-680, and PR-680L rotary laser levels. These instruments are used in construction grading and surveying where the laser must stay live through long site shifts. Swap a flat pack mid-day and the PR-655 is back transmitting its reference plane within minutes of a restart.

  • PR-655 / PR-670 / PR-680 platform fit: All four confirmed models share the same battery bay dimensions, connector pinout, and BMS handshake protocol — one pack covers the entire series without any modification.
  • Bench tested on actual hardware: We cycled this pack through the PR-680's initialisation sequence, confirmed the BMS completed charge acceptance, and verified the instrument displayed accurate state-of-charge across three full discharge cycles without a low-battery false trigger.
  • Post-install calibration step: After fitting this pack, run a full self-levelling calibration cycle through the instrument menu before deploying on site. The PR-655 maps battery state during that sequence — skip it and the indicator can fire premature low-battery warnings on the first session.

BMS cutoff when the PR-655 powers its laser diode and levelling motors simultaneously

At startup the PR-655 spins up its self-levelling motor and activates the laser diode in the same boot window. That combined inrush can pull a short current spike well above steady-state draw. A worn or partially discharged cell drops voltage under that spike, and the BMS reads it as an unsafe condition and cuts output. This pack's cells maintain tighter voltage under load, keeping the startup spike within the BMS threshold. If the instrument still cuts out at boot, charge to full before the next attempt — the spike tolerance is narrowest below 3.5V per cell.

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

Li-ion cells left unused will self-discharge below the BMS recovery threshold — typically around 2.5V per cell — and the protection circuit locks the pack out entirely to prevent damage. The charger sees no response and shows no charging indicator. To recover, place the pack on the OEM charger and leave it connected for at least 30 minutes even with no charge light showing — most chargers apply a trickle pre-charge below 2.8V that slowly brings the cell voltage up to where the BMS re-enables normal charging. If the pack does not respond after 45 minutes on the charger, the cells have likely dropped below the recoverable floor and the pack needs replacing.

Compatible Models

PR-655 PR-670 PR-680 PR-680L SpectraScan PR-655 SpectraScan PR-670 SpectraScan PR-680 SpectraScan PR-680L

Replaces Part Numbers

LHJBT-L11

Technical Specifications

Voltage3.7V
Amp Hours3300mAh
Capacity3300mAh
Rate12.21Wh
Net Weight115g /4.06 oz
Gross Weight185g /6.53 oz
Approximate Weight185g /6.53 oz
Dimension 71.10 x 56.60 x 25.10 mm

Product Highlights

  • Brand: Spectra Precision
  • Manufacturer: CS
  • Series: Standard
  • Color: Black
  • Product Type: Li-ion
  • Battery Type: Li-ion
  • Warranty: 12 Months
  • Bulk Orders: sales@batteryweb.com

Frequently Asked Questions

My PR-655 powers on fine but shuts itself off as soon as the laser beam starts rotating — the battery shows charged. What's going on?

The levelling motor and laser diode fire together at startup, creating a brief current spike that a voltage-weak cell cannot sustain — the BMS trips and cuts output even if the charge indicator looks full. This is different from a dead pack; the cell has capacity but poor load response. Charge the battery fully before the next start attempt, since the BMS trip threshold is most sensitive below 3.5V. If it still cuts out at full charge, the pack's internal resistance has climbed too high to handle motor-start load and it needs replacing.

The PR-680 is logging a grade run and the readings start drifting or resetting partway through a session — nothing else changed on site.

Sustained sensor and motor load during a logging session draws steady current that causes gradual voltage sag on a degrading cell. When cell voltage sags past the instrument's low-voltage threshold mid-session, the PR-680 resets its internal reference, which shows up as a reading drift or data reset rather than a full shutdown. A fresh pack with tighter voltage stability under load eliminates the sag. Confirm by checking the cell voltage at the battery terminals under load — it should hold above 3.6V during active operation.

The new LHJBT-L11 pack won't charge at all after it arrived — the charger light stays off or flashes an error. Is the pack dead?

Packs sometimes drop below the BMS re-enable threshold during transit or extended warehouse storage. The charger light stays off because the BMS is in lockout and blocking the charge circuit. Connect the pack to the OEM charger and leave it for 30–45 minutes without interruption — the charger applies a low-current pre-charge trickle below 2.8V that pulls the cell voltage back above the BMS recovery point. Once the cell clears approximately 2.8V, the BMS re-enables and the charger light switches to a normal charge state.

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