Bralko Galaxy II Replacement Battery 14.4V 3000mAh Ni-MH

Bralko Galaxy II — 14.4V Ni-MH Replacement Battery

This is a 14.4V Ni-MH battery rated at 3000mAh (43.2Wh), built to replace the original power cell in the Bralko Galaxy II cordless vacuum. It fits the Galaxy II directly and restores motor power when the original battery no longer holds a charge. No OEM part number applies to this unit.

• Galaxy II motor compatibility: The Galaxy II runs a brushed DC motor on a 14.4V rail. Ni-MH chemistry at this voltage handles the inrush current at startup without the BMS cutting out, which is a common fault when the wrong cell type or degraded original is fitted.
• Bench tested on actual hardware: We ran this cell through startup cycles and sustained load on the Galaxy II motor. The BMS held stable across repeated start events and did not trip under normal carpet load at rated draw.
• Dock charging practice for the Galaxy II: Do not leave the Galaxy II on the charging dock continuously. Cordless vacuums on permanent dock charge develop capacity fade faster than those charged only when depleted. Charge to full, then remove from the dock.

Suction dropping before the battery indicator reaches low on the Galaxy II

This happens when the motor draws more current than rated because airflow is restricted — usually a blocked filter or partial clog in the head. The battery voltage sags under that extra load before the cell is actually depleted, which tricks the vacuum into feeling like a battery problem. Clear the filter and check the suction path before swapping the battery. If suction recovers after a clean, the battery is not the cause.

Galaxy II motor cuts out mid-use then recovers after a short pause

This is a BMS overcurrent trip, not a faulty battery. When the filter is partially blocked, the motor works against restricted airflow and draws a sustained current spike above the BMS threshold. The BMS cuts power to protect the cell, then resets once load drops. Clean or replace the filter first. If the cutout still occurs on a clear filter, check that the battery contacts are clean and seating fully — poor contact raises effective resistance and can trigger the same trip at lower draw.