Drill works until it has had moderate use, then dies

Drill is 5 years old, had moderate use. Drill 5 to 10 holes in wood or drive 5 to 10 longer screws and the drill stops working, battery strength lights flash. Leave it alone for 3 to 5 minutes and it works again normally. Do the same amount of work and it repeats. If you only drill 1 or 2 holes or drive 1 or 2 screws the drill does not misbehave. A tool only replacement is $100 CDN and an upgrade to 1/2” is only $30 more with charger and bag. The repair solution needs to be inexpensive parts wise and not epic to perform. I’m willing to try a fairly simple repair/servicing. Any suggestions??