One of these will work well i think. They have a Lithium battery model too.
[ame="http://www.amazon.com/Black-Decker-LP1000-Alligator-Electric/dp/B000BANMUY"]Amazon.com: Black & Decker LP1000 Alligator Lopper 4.5 Amp Electric Chain Saw: Patio, Lawn & Garden@@AMEPARAM@@http://ecx.images-amazon.com/images/I/414DH0XM6TL.@@AMEPARAM@@414DH0XM6TL[/ame]
[ame="http://www.amazon.com/Black-Decker-LP1000-Alligator-Electric/dp/B000BANMUY"]Amazon.com: Black & Decker LP1000 Alligator Lopper 4.5 Amp Electric Chain Saw: Patio, Lawn & Garden@@AMEPARAM@@http://ecx.images-amazon.com/images/I/414DH0XM6TL.@@AMEPARAM@@414DH0XM6TL[/ame]