Worx WA3230 Landroid S Basic Replacement Battery 20V 3400mAh

Worx Landroid S300 / S450i / S500i — 20V Li-ion Replacement Battery (WA3230)

This 20V Li-ion battery at 3400mAh (68Wh) replaces the WA3230 in the Worx Landroid S Basic, S300, S450i, S500i, and over 29 additional Landroid models. It slots into the same bay and mates with the same contacts as the original pack. Voltage and connector match the OEM spec exactly.

• Landroid S-series platform fit: These models share a common 20V battery bay, contact layout, and BMS communication protocol. The WA3230, 50032492, WA3231, and 50032774 part numbers all reference the same form factor — this battery covers all of them.
• Bench tested on actual hardware: We ran this pack through the Landroid charge-discharge cycle on the OEM base station. The BMS accepted the charger handshake without faults and held voltage within spec across a full discharge sequence under simulated blade load.
• Seasonal storage tip: Before your first mow of the season, bring the battery indoors overnight if temperatures are below 10°C. Cold Li-ion cells have higher internal resistance, and the blade motor's inrush current can trip the BMS on a cold pack before it ever reaches the lawn.

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

The Landroid blade motor draws a sharp inrush current each time it bites into dense or wet grass. If that spike exceeds the BMS overcurrent threshold — typically 15–20A on this platform — the pack shuts down as a protection response. This is not a battery fault; it is the BMS doing exactly what it should. A new pack may trip more readily in the first few cycles until the cells condition and internal resistance settles. If cutouts persist past the fifth cycle, check that the blade disc is sharp and seated correctly, since a dragging blade multiplies the current draw.

Charger shows fault light after mower sat unused all winter

A Landroid battery that sat discharged through winter can drop below the BMS acceptance voltage — often under 14V on a 20V pack — and the OEM charger will refuse to engage, showing a red or flashing fault indicator. The fix is to place the pack on the charger and wait up to 30 minutes; some chargers trickle a recovery current before switching to full charge mode. If the charger does not respond at all after 30 minutes, the cells have likely self-discharged below the recovery threshold. To avoid this next season, store the pack at around 50% charge and recheck voltage every two months — target above 16V on a 20V pack going into storage.