Last year, Lidl did a cordless hammer drill and jigsaw which shared the same battery. You could also order up extra batteries. They seem to have the same ones on offer this Thursday - but have added a circular saw. So wondering if it uses the same battery?
The drill and jigsaw ain't got the biggest of batteries so probably no good for a pro - but for my sort of fairly frequent small jobs are fine, and of course quite light too.