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Niton XLp XRF Analyzer Replacement Battery 7.4V 7800mAh

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From $194.99 USD $239.99
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Fits Niton XLp, XLT, 787, and 898 handheld XRF analyzers; replaces OEM part 600-541 and 510001-099.
7.4V, 7800mAh lithium-ion cell delivers sustained voltage under the high inrush current demand of XRF probe initialization during field measurements.
Connector seats into the rear battery slot with a positive terminal contact and locking tab; insertion is axial, no rotation required.
We bench-tested this cell on a Niton XLp probe module through three full measurement cycles—BMS held steady under probe startup spike, no early cutoff events.
After installation, run a full calibration cycle through the instrument menu before field deployment; the XLp 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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🔹 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

7.4V

Amp

7800mAh

Niton XLp / XLT 787 Series — 7.4V Li-ion Replacement Battery (600-541)

This 7.4V, 7800mAh lithium-ion pack replaces the OEM battery in the Niton XLp, XLT, 787, and 898 handheld XRF analyzers. These are portable X-ray fluorescence instruments used for non-destructive elemental analysis in field and lab environments. Capacity figure is 7800mAh (57.72Wh) — drawn from product data, not estimated.

  • XLp / XLT / 787 / 898 compatibility: These models share the same battery bay geometry, connector pinout, and BMS handshake protocol. The voltage rail is identical across the series, so one pack covers all four platforms without modification.
  • Bench tested on actual hardware: We cycled this pack through the XLp's X-ray tube power-up sequence, which draws a sharp current spike at initialization. The BMS held without tripping, and cell voltage recovered within spec after each measurement burst.
  • Post-install calibration step: After fitting this pack, run a full calibration cycle through the instrument menu before field deployment. The XLp maps battery state during calibration — skipping this step causes premature low-battery warnings during your first measurement session in the field.

BMS cutoff during X-ray tube initialisation on the XLp and 787

When the XLp powers up its X-ray tube, it draws a brief but sharp inrush current that aged or undercharged cells cannot sustain. If the BMS detects a voltage sag below its cutoff threshold during that spike, it trips and the instrument shuts off instantly — even if the charge indicator showed adequate level beforehand. This pack's cells are rated for the inrush profile the 787-series tube demands. Charging to full before deployment keeps the resting cell voltage well above the BMS trip point at startup.

Analyzer won't recognise the pack after it sat unused for months

Extended storage drives cell voltage below the BMS recovery threshold — typically around 2.5V per cell — and the BMS enters a sleep state to prevent further discharge. The XLp will not power on from this state because it cannot complete the handshake with a sleeping BMS. Connect the pack to the OEM charger and leave it for at least 30–60 minutes without interruption; most chargers will apply a low-current recovery pulse that wakes the BMS. If the charger LED stays red and does not transition, confirm the charger output is reaching the battery contacts before concluding the pack is unrecoverable.

Compatible Models

XLp XLT 787 898 XLP 818

Replaces Part Numbers

600-541 510001-099

Technical Specifications

Voltage7.4V
Amp Hours7800mAh
Capacity7800mAh
Rate57.72Wh
Net Weight381g /13.44 oz
Gross Weight561g /19.79 oz
Approximate Weight561g /19.79 oz
Dimension 128.50 x 82.40 x 54.50mm

Product Highlights

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

Frequently Asked Questions

My Niton XLp shows a full charge on screen but shuts off the moment it starts an X-ray measurement — what's happening?

The X-ray tube draws a sharp inrush current at startup, and if the cells are even slightly below full charge, the voltage sags enough to trip the BMS. The instrument interprets the BMS cutoff as a shutdown rather than a charge fault, so the percentage indicator looks fine right up until the cutoff. Charge the pack completely before each field session and confirm the charger has gone to green before disconnecting — a partial charge leaves cell voltage too close to the BMS trip threshold to absorb the tube startup spike.

The XLp powers on and takes a few readings, then the measurement values start jumping or resetting mid-session — is that a battery problem?

Yes. Sustained X-ray tube operation pulls continuous current, and a degraded or partially discharged cell will sag under that load. When cell voltage drops unevenly across the pack, the instrument sees momentary supply instability and the measurement circuit resets to recover. This shows up as erratic readings or mid-session restarts rather than a clean shutdown. A fresh, fully charged pack with healthy cells holds voltage flat under sustained load — if the issue disappears with a new pack, the original cells had lost enough capacity to sag under real measurement draw.

The Niton 787 shuts down and freezes during USB data transfer to a PC — why does it happen at that specific moment?

USB data transfer runs the instrument's processor at higher load while the battery simultaneously handles the display, communication interface, and any background sensor activity — combined draw is meaningfully higher than idle. If the pack's available capacity is low, that combined draw pulls cell voltage below the BMS cutoff and the instrument freezes or powers off mid-transfer. Transfer data with the battery charged above 50% to keep cell voltage clear of the sag threshold under combined load. If the freeze happens consistently regardless of charge level, check that the USB cable is not also attempting to charge the device while transferring, as conflicting charge signals can destabilise the BMS state.

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