I have had the opposite results from ebay and Hong Kong charger. It is a slower charge, which IS easier on the battery, and the batteries are always 100% charged and don't lose 10% of their charge in the first 5 minutes the phone is unplugged like the stock charger does.
I rotate between 3 1500 mah batteries. One I got from Ebay for a Touch Pro 2 from here in the states (original htc battery) and 2 from Hong Kong that came with the wall charger. Hong Kong batteries don't last quite as long as the tp2, but close enough and much better than the stock 1300.
I used the same set-up with my blackberry Tour from the same seller and had positive results there as well. Have not regretted the $16 purchase (shipping included) one bit.