I purchased the Black and Decker cordless grass hog just 6 weeks ago.  The spool ran fine, until it approached the end when it went flying loose.  Yes, I have the newer orange capped model.

I replaced the line today, but the Automatic Feed System won't stop feeding!  I went through the whole replacement - trying to get it to work properly and then, when I thought it was ok, the rest ran out in about 5 minutes.  Meanwhile, the owner's manual is grossly inadequate and on line assistance doesn't seem to really exist on the Black and Decker site.

I doubt I will buy another black and decker cordless...