Kress 18V Cordless Drill Replacement Battery PF180/4.2 3000mAh

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

This is an 18V, 3000mAh (54Wh) Li-ion replacement battery for the Kress 180 AFB, APF 180/1.5, and APF 180/2.1 cordless power tools. It matches the OEM voltage rail, connector footprint, and BMS communication protocol of the original PF 180/4.2 pack. Slot it into your existing charger and tool — no adapters required.

• 180 AFB, APF 180/1.5, APF 180/2.1 compatibility: All three models run the same 18V platform, share the same slide-in connector, and use identical BMS handshake logic. One pack works across all three without firmware or charger changes.
• Bench tested on actual hardware: We cycled this pack through repeated trigger-pull events and sustained drilling loads. The BMS handled motor-start inrush current without nuisance tripping, and cell voltages balanced correctly across full charge and discharge cycles.
• First-use load conditioning on the 180 AFB: On the first two uses, run the drill at half torque before pushing maximum load. This gives the BMS time to profile the motor's inrush current signature and set accurate overcurrent thresholds before high-demand applications.

BMS cutoff on motor-start inrush with the 180 AFB

When you pull the trigger on a cordless drill, the motor draws a spike of current — often three to five times the running load — for the first fraction of a second. If the BMS reads that spike as an overcurrent fault, it cuts the pack off instantly. A new or freshly charged replacement pack can trip this threshold more easily until the BMS has logged a few real-world motor cycles. Two or three half-load runs let the BMS calibrate its overcurrent window to the actual motor draw of the 180 AFB before you go full torque.

Charger not recognising the new pack after storage

Li-ion packs can self-discharge below the charger's acceptance threshold during storage — typically under 2.5V per cell. When that happens, the charger sees a pack voltage that looks like a dead or faulty cell and refuses to begin a charge cycle. Some Kress chargers signal this with a blinking or solid red LED and no green transition. If this happens, leave the pack seated in the charger for 10–15 minutes — many chargers will trickle-feed a small recovery current to bring cell voltage above the acceptance floor, at which point the normal charge cycle begins. If the charger still does not respond, check each cell group is above 3.0V before reseating.