36V Signode BXT2-25 Compatible Battery 4000mAh Li-ion

Signode BXT2-25 / BXT2-32 — 36V Li-ion Replacement Battery

This is a 36V 4000mAh (144Wh) lithium-ion battery for the Signode BXT2-25 and BXT2-32 cordless electric strapping tools. These tools tension and seal plastic or steel strapping on pallets and packages in warehouse and shipping operations. No OEM part number is published for this pack — match by model number before ordering.

• BXT2-25 and BXT2-32 compatibility: Both models run the same 36V platform and share the same battery bay, connector pinout, and BMS handshake protocol. Swapping between the two tools on one battery is straightforward.
• Bench tested on actual hardware: We cycled this pack through repeated tensioning sequences and monitored the BMS response at peak motor draw. The pack held voltage above the low-cutoff threshold through full tensioning cycles without triggering a premature BMS trip.
• Cold-warehouse warm-up: If the tool sits in a cold dock below 10°C, bring the battery to room temperature before the first tensioning run. A cold cell raises internal resistance sharply — the motor's current spike at maximum tension can trip the BMS on a battery that would otherwise perform normally.

BMS cutoff during the tensioning cycle on the BXT2-25

The BXT2-25 motor draws a sharp current spike right at the point of maximum strap tension — this is the highest single load event in the tool's cycle. If the battery's BMS interprets that spike as an overcurrent fault, it trips and cuts power mid-cycle. This happens more often on a cold or partially discharged pack, where internal resistance amplifies the voltage sag under load. Charge the pack fully and confirm battery temperature is above 10°C before resuming work.

Charger shows a fault light on a new or stored pack

A pack stored for several months can drop below the charger's minimum acceptance voltage — typically around 30V on a 36V lithium pack. The charger reads this as a fault and refuses to begin a standard charge cycle. Some Signode chargers include a recovery or "boost" mode that trickle-charges the pack back above the acceptance threshold before switching to normal charge. If your charger lacks that mode, a compatible lithium recovery charger set to the 36V profile can bring the pack back up to 32–33V, after which the standard charger will accept it.