I've got some of the black-button, and clearance autos, plus the newer single-logo ones, and they seem to work fine on the slim chargers (like the diamond/stealths), with no need to flip plugs around: with the charger plugged in and showing green, I screw the batt in till its LED flashes. If the LED on the slimcharger does not turn red in a couple seconds, then give it up to a 1/4 turn more and the LED will turn red. After a while, you'll get brief green flashes over the red about once per second... and an hour or so later, all green.
odd that there's enuff contact to make the LED on the batt flash, but not enuff to start the charge.
odd that there's enuff contact to make the LED on the batt flash, but not enuff to start the charge.