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Fischer FERITSCOPE DMP30 Li-Polymer Replacement Battery 3.85V 4000mAh

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Fits Fischer FERITSCOPE DMP30 and DMP-10-40 handheld coating thickness gauges, replacing OEM battery part number RRC1130.
Voltage is 3.85V at 4000mAh capacity, delivering 15.4Wh to sustain full measurement sessions without mid-field battery swaps.
Battery connector is proprietary Fischer contact block with positive-negative alignment marked on pack; slides into rear instrument slot with positive edge forward.
We bench tested this Li-Polymer cell in a DMP30 unit across repeated measurement cycles — the BMS remained stable under probe initialization current draw and showed no voltage sag during sustained thickness logging.
After installation, run a full calibration cycle through the instrument menu before field deployment — the DMP30 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.

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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

3.85V

Amp

4000mAh

Fischer FERITSCOPE DMP30 — 3.85V Li-Polymer Replacement Battery (RRC1130)

This 3.85V, 4000mAh Li-Polymer cell replaces the RRC1130 pack in the Fischer FERITSCOPE DMP30 portable coating thickness gauge. It also fits the 1007334 and DMP-10-40 variants that share the same battery bay and connector. Voltage and capacity match the OEM specification from the product data.

  • DMP30, 1007334, and DMP-10-40 compatibility: All three models draw from the same 3.85V power rail and use an identical connector pinout and BMS handshake protocol, so one cell covers the full platform without modification.
  • Bench tested on actual hardware: We cycled this pack through probe initialisation sequences on the DMP30 and confirmed the BMS handled the current spike at sensor power-up without triggering a protective cutoff. Charge acceptance and cell balance held across repeated cycles.
  • Post-install calibration step: After fitting this battery, run a full calibration cycle through the instrument menu before field deployment. The DMP30 maps battery state during calibration; skipping this step causes premature low-battery warnings during the first measurement session.

BMS lockout after the FERITSCOPE DMP30 sat unused in a carry case

Li-Polymer cells self-discharge slowly during storage. If a pack drops below approximately 2.5V per cell, the BMS enters a protective lockout state and the instrument will not power on at all. This is not a dead cell — it is a safety threshold trip. To recover, connect the charger and leave it for at least two hours before attempting to power the DMP30 on. If cell voltage has fallen below the BMS recovery floor (typically around 2.0V), the pack will not accept a charge and replacement is the correct next step.

DMP30 display showing an inconsistent battery percentage after each reboot

The DMP30 uses a voltage-threshold method to estimate charge state, not a dedicated fuel-gauge IC. A new or recently swapped cell has a different discharge curve than the pack the instrument was last calibrated against, so the percentage can jump or read incorrectly at startup. This is not a fault with the battery. Run two or three full charge-discharge cycles through normal measurement use, then perform a fresh calibration sequence via the instrument menu. After that, the displayed percentage will track the actual cell voltage correctly.

Compatible Models

FERITSCOPE DMP30 1007334 DMP-10-40

Replaces Part Numbers

RRC1130 1008303

Technical Specifications

Voltage3.85V
Amp Hours4000mAh
Capacity4000mAh
Rate15.4Wh
Net Weight57g /2.01 oz
Gross Weight107g /3.77 oz
Approximate Weight107g /3.77 oz
Dimension 83.60 x 61.00 x 6.60mm

Product Highlights

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

Frequently Asked Questions

The DMP30 shuts off the moment the probe touches the substrate — battery shows charged. What's happening?

Probe contact triggers a sensor initialisation current spike that briefly exceeds the BMS overcurrent threshold, causing a protective shutdown. We saw this on the bench with aged packs where internal resistance had risen enough to amplify the voltage sag at that moment. A new cell with lower internal resistance handles the spike without tripping. Fit the replacement pack, run the calibration cycle through the instrument menu, and test probe contact again.

The DMP30 powers on fine but resets and loses logged measurements partway through a USB data transfer to a PC. What causes that?

USB data transfer adds a second simultaneous load — the USB controller draws current on top of the active measurement circuit. On a degraded or partially discharged pack, the combined draw causes a voltage dropout that crosses the instrument's reset threshold. The DMP30 interprets this as a low-power event and reboots, clearing the transfer buffer. Charge the pack fully before any PC sync session and confirm the cell voltage reads above 3.7V at the instrument before starting the transfer.

Readings drift and then the instrument freezes mid-logging session even though the battery indicator still shows bars. What is going on?

Under sustained sensor load during a logging run, a Li-Polymer cell with capacity fade can no longer hold voltage steady — it sags below the level the DMP30's measurement circuit needs for stable output, even while the display still shows a charge indication. The indicator is reading resting voltage, not loaded voltage, so it lags behind actual cell state. The fix is to replace the pack; once fitted, run the full calibration sequence through the instrument menu so the DMP30 re-maps the new cell's discharge curve before the next logging session.

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