TRANSPAK H45 14.4V 4000mAh Replacement Battery Li-ion

TRANSPAK H45 — 14.4V Li-ion Replacement Battery

This 14.4V 4000mAh Li-ion battery replaces the original power pack in the TRANSPAK H45 cordless strapping tool. The H45 is a portable electric strapper used for tensioning and sealing plastic and polypropylene strap on cartons and pallets. Voltage and capacity match the original cell configuration exactly.

• H45 strapper compatibility: The H45 runs a single 14.4V Li-ion pack that powers both the tensioning motor and the heat-seal weld cycle. The BMS must handshake at the correct voltage rail — a mismatched pack will not initialise the tool's control board.
• Bench tested on actual hardware: We cycled this pack through full tensioning sequences and heat-seal triggers. The BMS held current delivery stable through the motor's peak draw at maximum strap tension without tripping the protection circuit.
• Cold warehouse storage tip: In environments below 10°C, allow the battery to warm above that threshold before use. The tensioning motor draws sharp current at peak load — a cold cell's internal resistance climbs enough that the BMS can trip the protection circuit mid-cycle before the cell itself is depleted.

BMS cutoff during the tensioning cycle on a new battery

The H45 tensioning motor spikes current sharply at maximum strap tension — this is normal, but it stresses the BMS protection circuit on a new or cold pack. If the cell voltage drops momentarily below the BMS threshold during that spike, the circuit trips and the tool cuts out. This is not a faulty battery. Warm the pack above 10°C and run two or three partial tensioning cycles to let the cells stabilise before pushing to full tension load. If cutout persists on a fully charged, warm pack, check the battery contacts for oxide buildup — contact resistance amplifies voltage sag under peak draw.

Charger showing a fault light on a new pack after the tool has been stored

Li-ion cells that have sat discharged for an extended period drop below the charger's acceptance voltage threshold — typically around 10–11V on a 14.4V pack — and the charger refuses to start a charge cycle, showing a fault or error indicator instead. This is a self-protection response in the charger, not a sign the battery is dead. Some chargers have a recovery or "wake" mode; if yours does, activate it. If not, a bench power supply set to 14.4V at 200mA applied for 10–15 minutes can bring the cell voltage back above the acceptance threshold so the standard charger will engage.