Husqvarna Automower 260ACX 18V Replacement Battery 535 08 34-01

Husqvarna Automower 260ACX Series — 18V Ni-MH Replacement Battery (535 08 34-01)

This is an 18V 3000mAh Ni-MH replacement battery for Husqvarna Automower and Automover robotic lawn mowers, including the 260ACX, 210C, and over 40 additional models. It replaces OEM part 535 08 34-01 and its cross-reference variants. Capacity is 3000mAh (54Wh), matched to the original specification.

• 260ACX and 210C series fit: These models share the same 18V battery rail, physical connector, and BMS handshake protocol. One pack covers the full compatibility list without modification.
• Bench tested on actual hardware: We ran this pack through charge and full discharge cycles on a 260ACX unit. The BMS reported cell balance correctly at each cycle, and the mower's charge indicator cleared without fault codes.
• Seasonal storage tip: If the mower has been docked unused through winter, disconnect the battery and store it separately at room temperature. A pack left connected in a cold garage can self-discharge below the charger's acceptance threshold — typically under 10V — and the station will show a fault without beginning a charge cycle.

Charger showing fault after mower sat in garage all winter

Ni-MH cells left in a cold docking station over winter lose charge through self-discharge. If the pack drops below the charger's minimum acceptance voltage, the station flags a fault and refuses to charge. To recover, connect the battery to a standalone Ni-MH charger capable of a low-rate trickle or "wake-up" mode — this brings cell voltage back into the acceptance window. Once the pack reads above approximately 12V, the Automower docking station will recognise it and resume normal charging.

Mower cuts out mid-row then resumes after a short pause

This is thermal protection triggering, not a faulty battery. On thick or wet grass, the blade motor draws a sustained high current that raises pack temperature until the BMS trips the output. The mower goes quiet, waits, then restarts once the cells cool. Allow a 5-minute cooldown before resuming, and check that the blade disc is clear of compacted clippings — debris increases motor load and accelerates the trip.