Lots of searching this forum and elsewhere leads me to believe that if I buy what appears to be an OEM replacement battery for my Nexus 4, it will be either a used battery or a fake knock-off. The manager at my local Batteries Plus store even recommended against buying the replacement battery that they could provide me for my Nexus 4. He said they aren't as good as the original. I appreciated his honesty, but I am left searching for the holy grail -- a guaranteed OEM or equally high quality replacement battery that isn't used and that isn't a crappy, fake knock off. Can anybody help?