Worx WA3230 Landroid S Basic 20V Replacement Battery 2500mAh

Worx Landroid S Basic / S300 / S450i — 20V Li-ion Replacement Battery (WA3230)

This 20V 2500mAh (50Wh) Li-ion battery replaces the WA3230 and fits the Worx Landroid S Basic, S300, S450i, S500i, and 29 additional Landroid variants. It powers the blade motor, drive wheels, and onboard navigation electronics. Swap it directly for a dead or degraded original pack to keep your robotic mower running on its programmed schedule.

• Landroid S-series compatibility: The S Basic, S300, S450i, and S500i all run the same 20V battery rail with an identical connector and BMS handshake protocol. One pack covers the full range because Worx standardised the interface across this generation of Landroid mowers.
• Bench tested on actual hardware: We ran this pack through repeated blade-motor start cycles, monitoring BMS response during the inrush current spike. Voltage held stable at the 20V rail and the BMS did not trip under normal grass-cutting load sequences.
• Seasonal storage tip: Before storing the mower over winter, charge the pack to around 50–60% rather than full. A fully charged Li-ion pack sitting unused for months degrades faster than one stored at partial charge.

BMS cutoff during thick-grass or wet-grass blade load

The Landroid blade motor pulls significantly more current when cutting dense or wet grass — sometimes 3–4× the normal draw. If the BMS reads that inrush spike as an overload, it cuts power to protect the cells. This shows up as the mower stopping suddenly mid-run, usually with no error code. Let the pack sit off the charger for 5 minutes to reset the BMS, then resume on a drier section of lawn. Consistent trips in the same area usually point to a clogged blade housing increasing motor resistance, not a faulty battery.

Charger showing a fault light after the mower sat all winter

Li-ion cells self-discharge slowly over months. If the pack drops below roughly 2.5V per cell during winter storage, the charger's safety circuit reads it as a damaged pack and refuses to charge. The fix is a slow pre-charge: some Worx chargers will recover the pack if you unplug, wait 30 seconds, and reconnect — repeating 2–3 times allows the charger to trickle current in. If the fault light clears and charging begins, let it complete a full cycle before using the mower. If the fault persists after three attempts, the cells have dropped below recoverable voltage and the pack needs replacing.