I bought a cordless tool kit made by Black and Decker. It includes a 24 volt cordless drill and a 24 volt cordless circular saw and a power pack or whatever you call it.
After charging up the power pack, I tried out the drill. You can see sparks inside the "barrel" of the drill. I called customer service and they said as long as the sparks were inside the tool, it was safe.
Should I believe them, or am I going to perish in a fiery blaze?