Fromm P320 Strapping Tool Replacement Battery 12V 3000mAh

Fromm P320 Series — 12V Ni-MH Replacement Battery (N5-4315)

This is a 12V 3000mAh Ni-MH replacement battery for the Fromm P320, P325, P327, and P329 cordless strapping tools. It slots into tools used for plastic strapping on boxes and pallets. Capacity is 3000mAh (36Wh), matching the original pack specification.

• P320 / P325 / P327 / P329 compatibility: These models share the same 12V battery platform, connector format, and BMS handshake protocol. One pack covers the full range without modification.
• Bench tested on actual hardware: We cycled this pack through repeated tensioning loads on the P320. The BMS held stable through the sharp current spike at peak tension and recovered cleanly between cycles without tripping or latching fault states.
• Cold warehouse start-up: Ni-MH cells lose internal conductivity fast below 10°C. In a cold warehouse, warm the battery to above 10°C before starting work — the motor draws a sharp current surge on the first tensioning cycle, and a cold cell will trip the BMS before the strap is fully tensioned.

BMS cutoff during the tensioning cycle on the P320

The P320 motor draws its highest current at the end of the tensioning cycle, right at maximum strap tension. If the battery cells are cold, partially discharged, or the contact terminals have resistance from corrosion or dirt, that peak draw can push the cell voltage below the BMS cutoff threshold. The BMS trips as a protection response, not a cell failure. Clean the battery contacts with a dry cloth, confirm the pack is above 10°C, and ensure the charge state is above 50% before running a full tension cycle.

Charger shows a fault light on a new pack straight out of the box

A new Ni-MH pack that has sat in storage can drop below the voltage threshold the charger uses to confirm a valid battery is connected. The charger reads the low voltage as a fault rather than a flat pack and refuses to start the charge cycle. To recover it, hold the pack at room temperature for 30 minutes, then re-seat it firmly in the charger. If the fault persists, check the charger terminals are clean and that the pack voltage reads at least 9V across the terminals with a multimeter before retrying.