Upload & Sell: Off
Over the years I've purchased several 3rd party EN-EL4 and EN-EL4a batteries, and for the most part they were junk.
I finally threw in the towel after buying a pair of Pearstone batteries. They each lasted a few weeks and would just die mid-shoot. No warning, nothing. After several replacement batteries did the same thing, I just chucked them in the recycle bin. They weren't even worth my time.
I'll stick with OEM from now on....