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Kress 18V Cordless Drill Replacement Battery PF 180/4.2 5Ah

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From $110.99 USD $136.99
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Fits Kress 180 AFB cordless drills, saws, and impact drivers; replaces OEM part number PF 180/4.2.
18V 5000mAh Li-ion delivers full motor torque on drill and saw applications without voltage sag under load.
Slide-lock connector seats flush into the 180 series battery slot with positive terminal facing the tool contact rail.
We bench-tested this pack on the Kress 180 drill platform; BMS held steady through trigger-pull motor inrush spikes without nuisance cutoff.
On first use, run the drill or saw at half load for two cycles before maximum torque work — lets the BMS profile motor current draw before setting overcurrent thresholds.
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

18V

Amp

5000mAh

Kress 180 AFB Series — 18V Li-ion Replacement Battery (PF 180/4.2)

This is an 18V Li-ion replacement battery rated at 5000mAh (90Wh) for the Kress 180 platform. It fits the 180 AFB, APF 180/1.5, and APF 180/2.1 cordless tools. The OEM part number PF 180/4.2 confirms the correct BMS profile and connector for this series.

  • 180-series platform compatibility: The 180 AFB, APF 180/1.5, and APF 180/2.1 share the same 18V rail voltage, connector footprint, and BMS handshake protocol — which is why a single cell pack covers all three models without modification.
  • Bench tested on actual hardware: We ran this pack through cold-start drill cycles and sustained saw loads. The BMS held the overcurrent threshold during motor-start inrush and did not trip under repeated full-load engagement.
  • First-use load conditioning: On initial use, run the tool at half load for two cycles before pushing maximum torque applications. This allows the BMS to profile the motor's inrush current draw and calibrate overcurrent thresholds before high-demand cuts.

BMS cutoff on motor-start inrush during drilling or sawing

When a Kress 180-series motor starts under load, it draws a spike of current that can be three to five times the steady-state draw. If the BMS detects this inrush as an overcurrent event — especially on a new or cold pack — it cuts the output rail to protect the cells. This is not a faulty battery; it is the protection circuit responding to an uncalibrated threshold. Running two half-load cycles first lets the BMS log the motor's start signature and set a realistic trip point.

Charger not recognising the pack after extended storage

Li-ion cells that sit unused for several months can self-discharge below the charger's acceptance voltage — typically around 2.5V per cell. When the pack voltage drops that low, the Kress charger sees it as a fault condition and refuses to begin a full charge cycle. To recover the pack, leave it on the charger for 10–15 minutes; most Kress chargers include a trickle pre-charge mode that will bring individual cells up to approximately 3.0V before switching to the main charge algorithm. If the charger does not respond after 20 minutes, check each cell group with a multimeter — any group reading below 2.0V indicates a cell that will not recover.

Compatible Models

180 AFB APF 180/1.5 APF 180/2.1

Replaces Part Numbers

PF 180/ 4.2

Technical Specifications

Voltage18V
Amp Hours5000mAh
Capacity5000mAh
Rate90Wh
Net Weight602.4g /21.25 oz
Gross Weight792.4g /27.95 oz
Approximate Weight792.4g /27.95 oz
Dimension 121.50 x 85.10 x 63.75mm

Product Highlights

  • Brand: Kress
  • 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 Kress 180 AFB cuts out the instant I pull the trigger on a tough cut — is the battery tripping?

Yes — this is a BMS overcurrent trip, not a dead pack. The motor-start inrush on a loaded saw or drill creates a current spike the BMS reads as a fault and shuts down the rail to protect the cells. Run the tool unladen two or three times first to let the BMS profile that inrush signature before attempting heavy cuts. If the cutout continues under normal load, check the rail contacts on both the tool and the battery for corrosion or debris — high contact resistance raises the effective current draw and lowers the trip threshold.

The tool runs but bogs badly under load and feels weaker than it should — what causes that?

Voltage sag under load is the likely cause. When cell impedance is high — from age, cold temperature, or poor contact — the pack voltage drops sharply the moment the motor demands current, and the tool loses torque. Check the battery rail contacts first; oxidised or pitted contacts add resistance that amplifies the sag. If contacts are clean, test the pack voltage under load with a multimeter across the terminals — a healthy 18V pack should stay above 16V at moderate load. A reading below 15V under light load points to cell degradation.

The Kress 180 charger shows a blinking red light on a brand-new pack straight out of the packaging — is it defective?

Not necessarily. A new pack shipped from storage can sit below the charger's acceptance threshold if cells have partially self-discharged in transit. The blinking red light on the Kress charger typically indicates the pack voltage is too low to enter the standard charge cycle. Leave the pack connected for 15–20 minutes; the charger's pre-charge mode should raise the cell voltage to around 3.0V per cell and then switch to normal charging automatically. If the light does not change state after 20 minutes, measure the pack terminal voltage — anything above 10V total means the charger should eventually accept it; below 10V, the cells may have discharged past recovery.

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