Porter Cable PCC680L 18V Replacement Battery 5000mAh

Porter Cable PCC600 Series — 18V Li-ion 5000mAh Replacement Battery (PCC680L)

This is an 18V lithium-ion battery rated at 5000mAh (90Wh), built to fit Porter Cable PCC600-series cordless power tools. It covers drills, impact drivers, circular saws, and other tools in the 18V Porter Cable lineup. Compatible part numbers include PCC680L, PCC681L, PCC682L, PCC685L, and PCC685LP.

• PCC600-series platform fit: Porter Cable's 18V tools share a common slide-rail connector, voltage rail, and BMS handshake protocol across the PCC600 through PCC620 families. This battery meets that handshake so the tool's onboard electronics recognise it as a valid pack and allow full torque output.
• Bench tested on actual hardware: We ran this pack on a PCC601 drill and PCC620B circular saw under load cycles. The BMS held stable across motor-start inrush spikes and did not trip the overcurrent threshold during normal trigger pulls. Cell voltage balanced correctly across all charge cycles tested.
• Motor inrush break-in: On first use, run the tool at half load for two cycles before maximum torque applications. This allows the BMS to profile the motor's inrush current draw and set its overcurrent protection thresholds accurately before you push the tool hard.

BMS cutoff on drill or saw motor-start inrush surge

When you pull the trigger on a circular saw or high-torque drill, the motor draws a brief inrush current that can be three to five times the running current. If the BMS has not yet learned the motor's inrush profile — common with a fresh pack — it may interpret that spike as a fault and cut power instantly. This is not a defective battery. Running two half-load cycles first lets the BMS calibrate its overcurrent trip threshold to the actual motor signature. After that, full-load trigger pulls will not cause false cutoffs.

Charger blinking red on a new pack after storage

Li-ion packs self-discharge during storage. If a cell drops below approximately 2.5V, most Porter Cable chargers will not begin a standard charge cycle — they show a blinking red fault instead. Some chargers include a recovery or "wake-up" mode that pulses a low current to bring cells back above the acceptance threshold. If yours does not, place the battery in the charger, wait 10 minutes, remove it, and reinsert it — this prompts some charger firmware to re-evaluate the pack voltage. Target is to get cells above 3.0V per cell before the charger accepts a normal charge.