Martin Brown wrote:

My hedge takes about 2 hours to cut. All the battery powered hedge
trimmers I have ever used were clumsy and ineffective. At least with
lithium batteries they will be a bit lighter but a mains powered hedge
trimmer is still my preference.

Battery technology has improved enormously but hedge cutting require
real grunt and that quickly ends up with hot batteries that die young.

I haven't done a long session of hedge cutting yet, just some rough
hacking. However my brush-cutter will run for 2 hours on the same
batteries (a little shorter with the strimmer line head on it)