[ponyakr]

Originally Posted by propuckstopper

Check around online, including eBay. There are actually battery adapters out there that allow you to use, say, a Dewalt battery in a Milwaukee tool. EDIT:
https://www.youtube.com/watch?v=MMssklzoBAk

Those type adapters won't do any good for a chain saw, because the battery fits down into a hole which is barely bigger than the batt. There is no room for an adapter like those in the video, which fit underneath the handle & just make the battery hang a little lower.