Lizard-Stiga L300 25.2V Replacement Battery 13800mAh

Lizard-Stiga L300 — 25.2V Li-ion Replacement Battery

This is a 25.2V, 13800mAh (347.76Wh) lithium-ion battery for the Lizard-Stiga L300 cordless lawn mower. It powers both the cutting deck motor and the drive wheels. When the original pack can no longer hold enough charge to finish a mowing session, this replacement restores full operation.

• L300 platform fit: The L300 uses a 25.2V nominal rail with a specific connector and BMS handshake. This pack matches that voltage, connector format, and communication protocol so the mower's onboard electronics recognise and accept the battery without fault codes.
• Bench tested on actual hardware: We ran this pack through blade-start inrush cycles and sustained cutting loads. The BMS held charge delivery stable under repeated motor start events and correctly triggered thermal protection at threshold — no nuisance trips under normal grass load.
• Seasonal storage tip: Before the first mow of spring, bring the battery indoors overnight if 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 pack that hasn't warmed to room temperature.

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

The L300's blade motor draws a sharp inrush current each time it bites into dense or wet grass. If that spike exceeds the BMS current threshold — usually because the grass is unusually thick or the deck is clogged — the pack shuts down as a protection measure. This is not a battery fault; it is the BMS doing its job. Clear the deck of clippings, let the pack rest for five minutes to reset thermal state, then resume at a slower walking pace to reduce continuous load on the cells.

Charger shows fault light after the mower sat in storage all winter

Li-ion cells self-discharge slowly over months. A pack stored through winter can drop below the minimum acceptance voltage — typically around 2.5V per cell — and the charger's input circuit will refuse to begin a charge cycle, showing a fault or amber light. To recover the pack, some chargers have a manual "recovery" or "boost" mode that applies a low trickle current to bring cell voltage back above the threshold. If yours does not, try a compatible charger that supports deep-discharge recovery, aiming to bring pack voltage back above 20V before switching to normal charge mode.