Pressfit Lynx 18V Replacement Battery 3000mAh Li-ion

Pressfit Lynx / Puma Series — 18V Li-ion Replacement Battery

This 18V Li-ion battery replaces the original pack on Pressfit Lynx, Lynx RR, Puma, and Puma-RR cordless tools. Capacity is 3000mAh (54Wh). It fits the same battery slot and connector as the factory pack across all four platforms.

• Lynx and Puma platform compatibility: All four models — Lynx, Lynx RR, Puma, Puma-RR — share the same 18V rail, connector pinout, and BMS communication protocol, which is why a single pack covers the full lineup.
• Bench tested on actual hardware: We cycled this pack through drill and impact driver loads on the Pressfit platform. The BMS held the overcurrent threshold correctly on motor-start inrush and did not trip on repeated trigger pulls at full torque.
• Break-in load protocol: On first use, run your drill or impact driver at half load for two cycles before going to full torque. This lets the BMS profile the motor's inrush current draw before it locks its overcurrent protection thresholds — skipping this can cause early cutout on hard starts.

BMS cutoff on motor-start inrush surge with Pressfit drills and impact drivers

When you pull the trigger on a drill or impact driver, current spikes sharply before the motor reaches running speed — this is inrush current. On the Pressfit 18V platform, the BMS monitors this spike and will cut power if it reads above its overcurrent threshold. A new pack from storage can have a BMS that has not yet profiled the motor load, making it more likely to trip on that first hard pull. Running two half-load break-in cycles lets the BMS calibrate its thresholds to the actual motor signature of your tool, reducing false trips under full torque.

Tool bogs down or loses power under sustained load

Voltage sag under heavy load is distinct from a BMS trip — the tool keeps running but feels weak and slows mid-cut. This usually points to high contact resistance at the battery rail rather than a cell problem. Clean the battery terminals and the tool's contact pins with isopropyl alcohol, then check that the pack clicks firmly into the dock with no lateral movement. If sag continues after cleaning, measure the pack's output voltage under load — a healthy 18V Li-ion pack should not drop below 15V during normal drill or saw operation.