I have one of those uniross battery chargers than can charge 2 or 4 AA or AAA's.
However, it seems to not charge them properly. It charges with a high pitched whining noise coming from the charger unit and the green led that shows battery is charged comes on but the battery isn't fully charged most of the time and the charge times reflect this. ie 30min charge times when it should be around 3.5hrs etc.
Does anyone have any ideas as to what is causing this? I'v opened it up for a nosy but i can't see any faulty components or anything.
It's really annoying.