Someone gave me a cordless circular saw with a dead battery and no charger. So I could pay $150 for a new battery and charger, or I could take the battery from my Mikita drill that would work fine and run it off that. You'll need:
screw/drivers of several types
$9 auto-ranging probe I love you Harbor Freight
beer or perhaps the kindest kind
Step 1: Will it work?
I am not happy with this at all. The battery only last a few minutes. I am going to put a cord on it. A 12v 1.5 amp ac adapter barely spins it. The battery charger senses it not hooked up to a battery and does nothing. Maybe I could I could increase amps by putting several smaller transformers in parallel?
Dewalt is no help at all "This saw is designed to run using DEWALT 18v batteries, we do not recommend using any other power source for this saw. We do not have any other motor specifications for this unit." Liar...oops did I say that out loud?