Well, I've finally went to Mustaffa to get the infamous $18 intelli-charger. I'm pretty impressed with it and didn't even realise that this comes with the dc to dc function as well, and a car jack attachment. A definite value for money deal.
Took the 23 from SLS like Goose did, then walked to the mustaffa which is in the serangoon centre side. Went to the battery counter. The first old man there smiled and said that there was no more stock for the MW 4798. There was only the bulkier MW5798. Fortunately, the old man was relieved by a younger man who then proceeded to pass me the MW4798!
As for the batteries, simply couldn't get the $3.40 deal from the younger man who took over. Puzzled, I bought just the charger and proceeded to the original Mustaffa store. At the battery counter, I was immediately offered $3.40 per piece as long as I purchase in a pack of 4. Finally...
It certainly pays to be persistent and observant in Mustaffa. Customer Service really varies from person to person.