Flymo Easielife Go 18V Replacement Battery 4000mAh

Flymo Easilife Go / Easilife 200 / 350 / 500 — 18V Li-ion 4000mAh Replacement Battery

This 18V 4000mAh Li-ion battery replaces the original pack on Flymo Easilife Go, Easilife 200, Easilife 350, and Easilife 500 robotic and cordless mowers. It delivers the same 72Wh energy rating as the factory pack at the same voltage rail. Swap it in when your original battery no longer holds a full charge or you need a spare for back-to-back mowing sessions.

• Easilife series compatibility: The Easilife 200, 350, 500, and Go share the same 18V battery platform and connector format. A single replacement pack covers all four models without modification.
• Bench tested on actual hardware: We cycled this battery through full charge and discharge on an Easilife platform and confirmed the BMS handshake completed correctly. The pack accepted charge, reported state of charge accurately, and did not trigger premature cutoff under simulated blade load.
• Seasonal storage tip: Before bringing the mower out in spring, bring the battery indoors overnight if garage temperatures are below 10°C. Cold Li-ion cells carry higher internal resistance, and the blade motor's inrush current at startup can trip the BMS on a cold pack before it ever reaches the lawn.

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

The Easilife blade motor draws significantly more current through dense or wet grass than on a standard dry lawn. If the BMS detects a current spike that exceeds its protection threshold — common when the deck encounters a sudden thick patch — it will cut power to protect the cells. This is not a battery fault. The pack resets itself once load drops and cell temperature stabilises. If cutoffs happen repeatedly on normal grass, check that the cutting height is set appropriately for conditions.

Charger showing a fault light after the mower sat unused all winter

Li-ion cells self-discharge slowly in storage. Over a full winter, a pack left in a cold garage can drop below the charger's minimum acceptance voltage — typically around 12–13V on an 18V pack — causing the charger to show a fault or refuse to begin a charge cycle. To recover the pack, leave it at room temperature for two to three hours before attempting to charge again. If the charger still rejects it after warming, the cells may have dropped too low to recover safely.