Thought I’d mention this topic, as there don’t seem to be any similar threads on this forum.
Sometime ago, I one of my sons asked what I’d like for Christmas. I suggested a spare battery for my camera.
On Christmas day, he presented me with a EN-EL14A battery. I was very pleased with it.
I put it on charge, & noted that it was ‘ready’ in a rather shorter time than expected. I put it in my D3300 and within what seemed like a very short time, it showed as exhausted. This particular battery has been though many charge cycles, and never lasts as long as my other two. These are one supplied with the camera, and one bought directly from Nikon.
Today, as I was removing the short-lived battery, I happened to notice a very slight ‘bulge’ front to back on its casing. I compared it to my other two, which had no similar bulge. I didn’t mention this to my son, but asked where he’d bought it. Ebay, he triumphantly replied.
It was not a 2nd user item, and had been supplied in what looked like original Nikon packaging.
I‘ve no doubt, this particular battery will bulge more & may even eplode.
My conclusion – don’t buy from doubtful sources.
It could be disastrous!