Have a look here Reciprocating Saw for Pruning.
A Reciprocating Saw has many uses around the farm and workshop. It’s traditionally a demolition tool as it was not designed to make precise cuts. As you can see from this video, it can be used for branch trimming and pruning as well. Battery powered and fitted with an appropriate blade, it performs well at this task. My wife Marilyn wanted an easier way to trim and she did not want to use a chainsaw. I think the Recip Saw is an ideal alternative for this. I like the DeWalt as the price is competitive with other models plus the batteries fit other tools I already own.
More details on the page: Tool Review