Yard Force 1920763001 Easymow 260 Replacement Battery 20V 3400mAh

Yard Force Easymow 260 / MB 400 — 20V Li-ion Replacement Battery (1920763001)

This is a 20V Li-ion battery rated at 3400mAh (68Wh), built to replace OEM part 1920763001 and 1920625. It fits the Yard Force Easymow 260, MB 400, Mowbest, and Mowbest 805 Compact cordless lawn mowers. The pack slots into the same bay and connects to the same 20V charge rail as the original.

• Easymow 260 and MB 400 platform: These models share the same 20V battery bay, connector pinout, and BMS handshake protocol. One pack fits all listed models without modification or adapters.
• Bench tested on actual hardware: We ran this pack through full charge-discharge cycles on a 20V motor test rig. The BMS held protection thresholds steady at both low-load and high-inrush conditions — no false trips under simulated blade start current.
• Seasonal cold-start tip: If temperatures are below 10°C, bring the battery indoors overnight before mowing. Cold Li-ion cells carry higher internal resistance, and the blade motor's inrush current on a cold pack can trip the BMS before the cells have warmed up.

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

The Easymow 260's blade motor draws significantly more current through dense or wet grass than during normal cutting. If the draw spikes past the BMS overcurrent threshold — typically caused by a blade working through a heavy clump — the pack will cut power immediately to protect the cells. This is not a fault with the battery. Slow your mowing pace through thick sections, and avoid letting grass grow past the mower's rated cutting height before each session. After a BMS trip, remove the pack, wait 30 seconds, and reinsert — the protection circuit resets on reconnection.

Charger shows fault light after mower sat unused all winter

Li-ion cells self-discharge slowly in storage. After several months in a garage, a pack can drop below the charger's minimum acceptance voltage — typically around 12V on a 20V pack — causing the charger to flag a fault rather than charge. The fix is a brief recovery charge using a charger that supports recovery mode, or by checking cell voltage with a multimeter at the pack terminals. If the pack reads above 10V, a standard charger will usually accept it after one or two connection attempts. Below 10V, the cells have likely gone into deep discharge and the pack should be replaced.