Tenergy 1000mAh AAA cell insanely hot while charging.



I was charging a 1000mAh "Tenergy Premium" Ni-MH AAA cell and it was so hot I couldn't keep my fingers on it. I'm charging it in a nitecore d4. It looked like it was pretty much complete, was 1.45v -- is this normal for a first charge? I've heard of this happening when breaking a cell in. Should I be cautious?

Edit: was charging at 750mA
Edit 2: it seems to have dropped down to 1.44v when I put it back in there after it cooled. Curious...hope I didn't damage the cell.