Landxcape LA0001 20V Lawn Mower Replacement Battery 3400mAh

Landxcape LX790i Series — 20V Li-ion Replacement Battery (LA0001)

This is a 20V 3400mAh Li-ion battery for the Landxcape LX790i and LX790 series cordless lawn mowers. It also fits the LX792 and LX795. OEM part numbers LA0001, LA0002, and 50037124 all cross-reference to this pack.

• LX790 series fit: The LX790, LX790i, LX792, and LX795 share the same 20V battery rail and connector housing. The BMS handshake protocol is consistent across this range, so one pack services the whole platform.
• Bench tested on actual hardware: We ran this pack through full charge and discharge cycles on the LX790i platform. The BMS correctly balanced cells during charge and held voltage under simulated blade-motor inrush current without nuisance tripping.
• Seasonal storage tip: Before storing the mower over winter, run the battery down to around 40–50% charge — not flat. A fully charged or fully depleted Li-ion pack sitting for months accelerates cell degradation faster than normal cycling does.

BMS cutoff on thick grass or wet-grass blade load

The blade motor on the LX790i draws a sharp inrush current each time it bites into dense or wet grass. If the battery cells are already warm from a long mowing run, that spike can push current draw past the BMS overcurrent threshold. The BMS shuts the pack down as a protection response, not a fault. Let the battery cool for five minutes, then restart — the BMS will reset and accept load again.

Charger shows a fault light after the mower sat all winter

Li-ion cells self-discharge slowly during storage. If the pack dropped below around 2.5V per cell over winter, the charger's acceptance circuit will refuse to begin a charge cycle and flag a fault. Some chargers include a recovery or wake-up mode — engage that if available. If not, a compatible charger with a trickle-charge function can bring cell voltage back above 3.0V, after which a normal charge cycle will complete.