Looking to buy a Battery for my D5100

I want to buy a spare battery for an upcoming trip.

My preferred supplier would be Adorama but when I did a search for "Nikon Lithium Ion Battery Pack EN-EL14" exactly as on my current battery the results don't show any such battery although there was a Nikon Lithium Ion Battery Pack EN-EL14h.

So questions are:
What is the correct battery to get for a Nikon D5100?
Where can I get one?

Obviously I want it to be compatible with my recharger.

Thanks in advance

Isn't it the EN-EL14? A quick shopping search online should bring up some results where to get one over there. A quick look over here and they're plentyful!

Yeah 14A is correct. But seems not so cool with camera and charger according to some reviews