Greenworks LM4102 48V Cordless Lawnmower (Tool Only)

What battery do I need for this lawnmower?

This model requires two 24V 4Ah batteries to achieve the full 48V power rating. The batteries are sold separately, allowing you to choose the capacity that suits your garden size. Greenworks 24V batteries are compatible across their entire tool range, so you can share batteries between different garden tools. A 4Ah battery typically provides around 30 minutes of cutting time.

How large a garden can this mower handle?

The LM4102 can cover up to 440m² on a single charge with two 4Ah batteries. This makes it suitable for small to medium gardens. The actual coverage depends on grass conditions, cutting height and terrain difficulty. For larger gardens, consider purchasing additional batteries to extend runtime, or plan your mowing across multiple sessions.

Can I use this mower for mulching?

Yes, this is a 2-in-1 system that switches between collection and mulching modes. For mulching, you remove the grass bag and close the rear discharge chute. The mower then cuts grass clippings into fine particles that fall back onto the lawn. Mulching returns nutrients to the soil and reduces the need for chemical fertilisers, promoting healthier grass growth.

How do I adjust the cutting height?

The cutting height adjusts via a single central lever that moves all four wheels simultaneously. This ensures perfectly level cuts across the entire width. The six positions range from 30mm for a close finish to 80mm for longer grass. The lever system is much more convenient than adjusting each wheel individually, saving time and ensuring accuracy.

Is this mower suitable for slopes and uneven ground?

The large 20.32cm rear wheels provide excellent traction and stability on slopes and uneven terrain. However, like all walk-behind mowers, it's not recommended for steep inclines over 15 degrees for safety reasons. The wheel size helps prevent scalping on bumpy ground and provides better grip on wet grass compared to smaller wheels.

How much storage space does this mower need?

With the handle folded down, the mower measures approximately 136cm deep, 49cm wide and significantly reduced height for compact storage. The folding handle is the key space-saving feature, allowing storage in sheds with limited vertical clearance. When folded, it can fit under most workbenches or in standard garage spaces alongside other tools.

What warranty coverage does this mower have?

Greenworks provides a 3-year warranty on the mower itself, covering manufacturing defects and component failures under normal use. Batteries carry a separate 2-year warranty. This extended coverage reflects the manufacturer's confidence in build quality and provides peace of mind for your investment. Warranty service is handled through authorised UK dealers.

How does the brushless motor compare to brushed motors?

Brushless motors eliminate the carbon brushes that create friction in traditional motors. This results in approximately 25% longer runtime, reduced heat generation and significantly extended motor life. Brushless technology also provides more consistent power delivery throughout the battery discharge cycle, maintaining cutting performance even as batteries drain. The motors run quieter and require virtually no maintenance.