What kind of charger does a Black & Decker Pivot Plus use?

Here’s an obscure question. I have a Black & Decker Pivot Plus electric screwdriver. I lost the charger. The cost for a new charger is almost as much as another unit. I’ve been putting off doing anything about it because I don’t want to waste money on the charger, but I don’t want to have an extra driver lying around either because someone will end up needing that one and then they won’t have a charger.

So, does anyone else own this? I need to know the charger specs, because I have a multi-purpose charger with different tips and voltages. It’s 6V, so I guess I need 6V, but is the tip positive or negative?