TIP # 1: Ok, the adaptor is probably made in CHINA( It actually is, I just checked) and as a result there is no distinguishing feature on the prongs of the charger. I suggest you plug the adaptor with the cord extending to the right, NOT to the LEFT. The battery will hold a better charge. TIP# 2: I found this on accident while at work. I pluged my charger into an isobar 6 surge protector and my battery was fully charged within a couple hours. The charge lasted for about two days with normal use.