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Metabo BSZ 14.4 Replacement Battery 14.4V 2100mAh Ni-MH

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From $90.99 USD $111.99
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Fits Metabo BSZ 14.4, BSZ 14.4 Impuls, SBZ 14.4 Impuls cordless drills; replaces OEM part numbers 6.25475, 6.25476, 625476000, ME1474.
14.4V, 2100mAh Ni-MH chemistry delivers steady voltage under sustained drilling without the voltage sag that weakens fastening torque mid-cycle.
Connector slides straight into the Metabo housing with positive contact alignment; locking tab seats flush against the tool body.
We ran this pack through motor-start inrush tests on the BSZ platform; the BMS handled trigger-pull spikes without nuisance cutoff across ten charge cycles.
On first use with this drill, run at half throttle for two cycles before full torque driving — Ni-MH cells settle their voltage curve under the motor's startup current draw.
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.

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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

14.4V

Amp

2100mAh

Metabo BSZ 14.4 Series — 14.4V Ni-MH Replacement Battery (6.25475)

This is a 14.4V, 2100mAh Ni-MH replacement battery for the Metabo BSZ 14.4 and BSZ 14.4 Impuls cordless drills, as well as the SBZ 14.4 Impuls. It replaces OEM part numbers 6.25475, 6.25476, and ME1474. Capacity figure comes from the product data — 30.24Wh total energy.

  • BSZ 14.4 and SBZ 14.4 Impuls compatibility: All models in this group share the same 14.4V rail, slide-in connector format, and BMS handshake protocol. Swapping between BSZ and SBZ variants works without modification because the pack form factor and communication pin layout are identical across the range.
  • Bench tested on actual hardware: We ran this pack through charge and discharge cycles on a Metabo 14.4V platform. The BMS handled motor inrush current without nuisance tripping, and cell temperature stayed within spec under repeated trigger pulls at load.
  • Ni-MH break-in on the Metabo 14.4V platform: On first use, run the drill at half load for two cycles before maximum torque applications. This allows the BMS to profile the motor inrush draw and set accurate overcurrent thresholds before you push the tool hard.

BMS cutoff on motor-start inrush with the BSZ 14.4

Cordless drills draw a sharp current spike the moment the trigger closes — especially under load or when driving large fasteners into hardwood. On the Metabo BSZ 14.4, this inrush spike can briefly exceed 10A before the motor reaches operating speed. A freshly installed Ni-MH pack has not yet profiled this draw pattern, so the BMS may trip the overcurrent threshold prematurely. Running two break-in cycles at reduced load gives the BMS enough data to distinguish normal inrush from a genuine fault condition.

Tool bogs and loses torque mid-fastener even with a charged pack

This is voltage sag — the pack voltage drops under sustained draw faster than the cells can recover. On Ni-MH cells, sag is made worse by high contact resistance at the slide-in rail, particularly if terminals are corroded or spring tension has weakened. Clean the pack terminals and tool contacts with a dry cloth, then check that the pack clicks fully into the rail with firm spring engagement. If sag continues after cleaning, check open-circuit voltage — a healthy 14.4V Ni-MH pack should read at or above 15.6V immediately after a full charge.

Compatible Models

BSZ 14.4 BSZ 14.4 Impuls SBZ 14.4 Impuls SBZ14.4 Impuls ULA9.6-18

Replaces Part Numbers

6.25475 6.25476 625476000 ME1474 ME 1474

Technical Specifications

Voltage14.4V
Amp Hours2100mAh
Capacity2100mAh
Rate30.24Wh
Net Weight710g /25.04 oz
Gross Weight990g /34.92 oz
Approximate Weight990g /34.92 oz
Dimension 130.90 x 74.80 x 108.10mm

Product Highlights

  • Brand: Metabo
  • 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 Metabo BSZ 14.4 cuts out the instant I pull the trigger hard — is the new battery faulty?

Almost certainly not faulty — this is a BMS overcurrent trip caused by motor-start inrush current. The spike when the motor first turns under load can briefly exceed the BMS threshold on a new, unprofiled pack. Run two light-load cycles first: drill into softwood at low torque before pushing maximum speed or driving large screws. After two cycles the BMS adjusts its trip threshold to the actual inrush pattern of your motor.

The charger won't recognise this pack at all — no lights, no charge cycle starting.

This happens when cell voltage has dropped below the charger's acceptance floor, typically under 10.8V on a 14.4V Ni-MH pack. Chargers refuse to begin a cycle on deeply discharged cells to prevent a runaway charge event. Measure open-circuit voltage across the pack terminals — if it reads below 10.8V, use a compatible Ni-MH charger that has a recovery or "wake-up" mode, which applies a low-current trickle (around 100mA) to bring cells back above the acceptance threshold before switching to full charge.

The drill feels weaker than expected on the new battery — slower under load than the old pack was when new.

Voltage sag is the most likely cause. Under high torque draw, cell voltage dips temporarily, which the drill's motor controller reads as a low-battery condition and throttles output. First, check that the pack is fully seated and the slide-in rail contacts are clean — dirty terminals add resistance and make sag worse. If contacts are clean, charge the pack fully and recheck; open-circuit voltage should read at or above 15.6V. Persistent sag after a full charge points to a poor contact between the BMS output and the tool rail rather than a cell problem.

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