Same thing happened to a friend of mine. They are getting him a new
charger and battery. They say it was recalled. His was one year old.

Mike_in_SD wrote:
If I let my drill battery charge for 1hr or so it works really well.

If I leave it in the charger over night and use it the next day, its
junk, with barely a charge.

You would think the thing would do a fast charge and then go to
a functioning trickle charge so you could keep in on there for
ever and use it when you need it.

It has done this since new