I'm using a LaCrosse BC-900. The charger isn't the issue.

I'm testing them all and when they're 'dead' I'm running them on the 'refresh' cycle just to be sure...that's why the whole process is taking so long.

I think for some of them they're just old. I came across some the other day that I'd misplaced and the charger wouldn't even register that a battery was inserted let alone try to charge it.