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Metabo 6.25475 Cordless Drill Replacement Battery 14.4V 3300mAh

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From $107.99 USD $132.99
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Fits Metabo BSZ 14.4, BSZ 14.4 Impuls, SBZ 14.4 Impuls drills; replaces OEM part 6.25475, 6.25476, 625476000, ME1474.
14.4V Ni-MH pack at 3300mAh delivers 47.52Wh to the motor; capacity matches OEM spec for full torque on fastening and drilling cycles.
Connector slides straight into the tool's grip slot with a single locking tab; no adapter needed, seats flush on first insertion.
We ran load testing on the motor-start inrush at full trigger — BMS held steady through the current spike with no cutoff lag.
On first use with this Ni-MH pack, run the tool at half throttle for two cycles before sustained high-torque fastening; allows the charger's conditioning phase to complete and stabilises cell voltage under peak load.
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

3300mAh

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

This is a 14.4V 3300mAh Ni-MH replacement battery for the Metabo BSZ 14.4, BSZ 14.4 Impuls, SBZ 14.4 Impuls, and SBZ 14.4 Impuls series cordless drill/drivers. It matches the OEM part numbers 6.25475 and 6.25476. The pack slots directly into the original battery bay and communicates with the factory charger.

  • BSZ and SBZ 14.4 platform fit: These models share the same 14.4V rail, battery connector, and BMS handshake protocol. The pack geometry and contact placement are identical across the BSZ 14.4, BSZ 14.4 Impuls, and SBZ 14.4 Impuls variants, so one battery serves the full lineup.
  • Bench tested on actual hardware: We ran this pack through full charge and load cycles on a BSZ 14.4. The BMS held stable through repeated trigger pulls, and the charger accepted the pack without fault codes or termination errors.
  • Break-in procedure for Ni-MH cells: On first use, run the drill at half load for two full discharge-charge cycles before applying maximum torque. Ni-MH cells need a conditioning period — skipping this leaves usable capacity unrealised and can cause premature voltage cutoff under heavy fastening loads.

BMS cutoff on motor-start inrush during hard drilling

When a drill bit bites into dense material, the motor draws a spike of current before it reaches operating speed. On a 14.4V Ni-MH pack, this inrush can exceed the BMS overcurrent threshold — especially if the cells haven't been conditioned. The BMS trips to protect the cells, and the tool cuts out instantly mid-hole. Running two break-in cycles at reduced load gives the BMS current data to calibrate its trip threshold before you push the pack hard.

Tool bogs and loses torque under sustained load

If the BSZ 14.4 feels weak or slows during long fastening runs, the issue is usually voltage sag — the pack voltage drops under load as cell impedance rises. On a used Ni-MH pack, this is often caused by cell sulfation from repeated shallow cycling. Check the rail contacts on both the battery and the tool for oxidation first — dirty contacts add resistance and worsen sag. A fully discharged and recharged pack should hold above 12.5V under moderate drilling load; below that, cell degradation is the cause.

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 Hours3300mAh
Capacity3300mAh
Rate47.52Wh
Net Weight832g /29.35 oz
Gross Weight1112g /39.22 oz
Approximate Weight1112g /39.22 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 moment I pull the trigger on a hard surface — what's happening?

That's a BMS overcurrent trip caused by motor-start inrush current exceeding the pack's protection threshold. It's more common on a new or freshly replaced Ni-MH pack that hasn't been conditioned. Run the drill at half load through two full discharge-charge cycles — this gives the BMS real current data to set its trip threshold accurately. After conditioning, the pack handles full trigger pulls without cutting out.

The Metabo charger isn't recognising this new battery after it sat in the box for a few months — the indicator just blinks without starting a charge cycle.

Ni-MH packs can self-discharge below the charger's acceptance voltage during storage. Most Metabo chargers require the pack to sit above approximately 1.0V per cell before they'll initiate a charge cycle. If the charger won't engage, connect the pack for 10–15 minutes anyway — some chargers will trickle-charge a low pack into the acceptance range before switching to full charge. If the charger still refuses, a brief manual boost with a compatible Ni-MH charger set to 0.1C will bring the pack voltage up enough for the Metabo charger to accept it.

The BSZ 14.4 runs noticeably weaker in cold weather on the job site — is this a faulty battery?

It's not a fault — it's normal Ni-MH behaviour. Internal resistance in Ni-MH cells rises sharply below 5°C, which causes voltage sag under load and reduces available torque. Keep the battery pack inside your jacket or a tool bag between uses on cold days to hold it near ambient indoor temperature. Once back in the warmer range, cell resistance drops and full torque returns — no action needed beyond warming the pack before use.

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