Incidentally, it is not out of place to fear, that the batteries might be working, how long back it was charged etc etc. if Rahul knew the source of these batteries, the same source would also have a charger for the same. Yes, LI-ION cell charger might cost more, as sold as a product. as you rightly said, if a mail could reach him indicating a circuit, there is no certainty of its correctness to the extent of not damaging the batteries, leave alone charging. while schematic on the forum is subject to hell of check and critical study by many experienced persons, thus reduce the chances of damage.