I have the 24volt adapter (240v) UK.
I have made one for my 12volt and 18volt systems too.
The 12v works a treat.
My 18volt system however, lacks power and gets hot. It needs a higher amp transformer which cost a lot. And are too big to fit in the empty battery case.
My fool proof solution was to buy one, or in my case two or three of each tool.
I always have corded and cordless tools with me although I use the cordless tools much more.
In fact, the only times I use the corded tools are when:
Routing, Sanding, planing, core drilling, concrete breaking etc. Oops, and Mitre saws, I never bought the cordless one.
All other situations I use cordless tools.
My favourites are the biscuit jointers, drills/drivers/sds, torches, circular saws, recip saws, cut out tools and grinders. My 18v tools definately get used more than all others.