Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Nikon Camera Battery

Spare batteries seem to disappear into some sort of "blackhole" whenever I really need them! I was packing for my trip to Hawaii when I noticed that my spare Nikon camera battery was missing. I've had terrible luck with "no name" replacement batteries being able to keep their charge and with manufacturers always changing batteries, it was impossible to find this battery in stock locally. The last time I ordered one on eBay, I received a no name despite the description claiming it to be the OEM brand battery. With much hesitation, I ordered one from Amazon and am happy to report that not only did I receive a Nikon branded battery, Amazon Prime was able to deliver the battery to me in time for my vacation - as promised!