The Gtech ST05 14.4v Cordless Telescopic Grass Trimmer looks pretty impressive. Powered by a rechargeable 14.4 volt Li-Ion battery you are not restricted by the length of your mains cable.
Unlike other strimmers the Gtech ST05 does not use a plastic line that winds onto a reel. Instead it has a replaceable spear shaped plastic blade similar to ones used on some electric lawn mowers.
The video below demonstrates how versatile the Gtech ST05 is.
It is available direct from Gtech as well as from Argos.
You cannot buy the Gtech ST05 anywhere
Thats because it is obsolete, Gtech say they have a new one launching sometime in April 2016.
Replaced with the Gtec ST20 cordless grass trimmer http://www.gtech.co.uk/garden-tools/gtech-st20-cordless-grass-trimmer.html