I have a Lithium battery drill driver where the wires to the charger broke off at the plug. I cannot determine the correct polarity by looking at the plug since none of the wire is left.
I know I can open up the drill and find the circuit board and determine the correct polarity of the connector, but my experience with these things is that once opened they can be a bitch to stuff back together, so I would like to avoid that if possible.
So, the question is: Can I determine the correct polarity by applying a current limited voltage to the jack in both directions without blowing it up? I.e. is it likely that the correct polarity and the reverse polarity will behave in a distinguishable manner when voltage is slowly applied? I have a lab supply with current limiting so, I can do this while monitoring what happens. The wall wart that plugs into the drill puts out a constant 10V, so the charging circuit is inside the drill.
Any ideas?
Edit: It has a non standard power connector with no legend to show the polarity.
Bob
I know I can open up the drill and find the circuit board and determine the correct polarity of the connector, but my experience with these things is that once opened they can be a bitch to stuff back together, so I would like to avoid that if possible.
So, the question is: Can I determine the correct polarity by applying a current limited voltage to the jack in both directions without blowing it up? I.e. is it likely that the correct polarity and the reverse polarity will behave in a distinguishable manner when voltage is slowly applied? I have a lab supply with current limiting so, I can do this while monitoring what happens. The wall wart that plugs into the drill puts out a constant 10V, so the charging circuit is inside the drill.
Any ideas?
Edit: It has a non standard power connector with no legend to show the polarity.
Bob