As a recent convert to shihl battery tools, and based only on the strimmer that I have so far I would also put these in your list of options. Mine is the AK battery system which is cheaper than the professional AP system but seems suited to my garden size.
I bought this, just for the chainsaw and hedge cutting. No problems so far. My logic was that it was going to cost me far more than £150 to get someone in to crop the oak tree and cut the hedge. So at this price, it was almost disposable. https://www.machinemart.co.uk/p/the-han ... ulti-tool/
I don't have one, but they are popular around here as a "chainsaw on a stick"pruning tool. Real men still climb trees with a chainsaw, but plenty have converted to pruning from the ground (we're all getting older). As a chainsaw, I have used a cheap Kraft variant, and it did a hedge trimming job pretty well (but with the chainsaw blade, not the hedge trimmer). It would be woefully underpowered as a strimmer, and for cutting large bits of wood not appropriate. - it is a pruning tool.