Here is a list of leading eco trimmers and edgers from Amazon.com:

Black & Decker NHT524 24 Volt 24-Inch Cordless Electric Dual Action Hedge Trimmer With One Battery

The NHT524 Cordless Hedge Trimmer At a Glance:

• Delivers high-level trimming performance without gas, oil, or pull cords
• 24″ extended-reach blades trim more in less time with better results
• Up to 3/4″ cut capacity allows you to trim virtually every plant type in your yard
• Precision-cut and hardened steel blades for years of trouble-free service
• Dual-action blades reduce vibration by 40% compared to single-action tools, dramatically reducing user fatigue
• Releases zero harmful emissions; includes Energy Star certified charging system

Black & Decker NST1024 24 Volt Cordless String Trimmer/Edger with PowerCommand and Battery

The NST1024 Cordless String Trimmer and Edger At a Glance:

• Delivers high-level cutting performance without gas, oil, or pull cords
• Patented gear drive transmission dramatically increases power output
• Power CommandTM feature lets you choose between two modes: Normal and Boost
• Adjustable aluminum shaft and soft no-slip grip areas
• Releases zero harmful emissions; includes Energy Star certified charging system

Greenworks 21062 18 Volt 1.7 Ah Ni-Cad 12-Inch Cordless Electric String Trimmer/Edger With One Battery & Charger

Product Features:

• 18 Volt Ni-Cad Trimmer/Edger
• 1.7 Ah Battery and Charger Included
• Easy Conversion to Edger
• 12 inch Cutting Path
• 4 Year Parts & Labor Warranty

Greenworks 21602 20 Volt Lithium Ion 12-Inch Cordless Electric String Trimmer/Edger With One 6.0 Ah Extended Run Time Lithium Ion Battery & Charger

Product Features:

• 20 Volt Lithium Ion Trimmer/Edger
• 6.0 amp hour Battery and Charger Included
• Easy conversion to edger
• 12-inch cutting swath
• 4 Year Parts & Labor Warranty, 1 Year Warranty On Battery

Greenworks 22032 18 Volt 1.7 Ah Ni-Cad 22-Inch Cordless Electric Dual Action Hedge Trimmer With One Battery & Charger

Product Features:

• 18 Volt Ni-Cad Hedge Trimmer
• 1.7 Ah Battery and Charger Included
• 22 inch Dual Action Blades
• 3/8 inch Cutting Capacity
• 4 Year Parts & Labor Warranty

LEHR ST025DC 25cc Propane Powered 4-Stroke Detachable Curved-Shaft Eco Trimmer

• Propane-Powered Eco Trimmer with Detachable Curved Shaft At a Glance:
• Powered by clean, green propane
• 17″ cutting swath, bump feed head, and .080″ diameter line
• Easy starts with innovative Twist ‘n Go fueling technology
• Exceeds 2011 EPA emission standards; winner of the EPA Clean Air Excellence Award
• Reduces dependency on foreign oil

WORX GT WG151.5 18-Volt Cordless Electric Lithium-Ion String Trimmer/Edger With One Battery & 30-Min Charger

Product Features:

• In-line edging: Convert the GT trimmer into a walk-behind edger and vice-versa in a matter of seconds.
• Protection included: An adjustable spacer guard protects plants, flowers and garden furniture from damage while trimming.
• 90-degree tilting shaft orients the cutting head for sloped and hard-to-reach areas.
• 100% automatic single-line feed for best cutting performance.
• Lithium-ion battery technology: long life, no self discharge, light weight and no memory effect.

Greenworks 22112 22-Inch 4.0 Amp Electric Dual Action Hedge Trimmer

Product Features:

• 22-inch Electric Hedge Trimmer
• 4.0 amp Electric Motor
• 1/2-inch Cutting Capacity
• Dual action blades provide cutting efficiency and reduce vibration
• Lock out button helps prevent accidental start ups