Which is the best cordless hedge trimmer and why?

Hello & thank you for your question. I found a couple of good cordless trimmer options for you, depending on what you want to use your trimmer for. The first is the battery powered Black & Decker NHT518 hedge trimmer which gives you mobility & is great for quick jobs involving branches under 1/2" thick. The Black & Decker is lightweight, quiet, & you have the option of purchasing additional bettery packs. I also found the gas powered Echo HC-150. This trimmer is a bit pricier, around $280, but still gives you mobility & can also cut branches up to 3/4" thick with ease. The Echo has a double sided, double reciprocating blade, is easy to start up & Echo engines are known for their reliability.