Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Some are NOT working!

I bought 2 packs, total 100 cell batteries from the seller on Oct 2012.I opened it and replaced the music book and a toy a while ago.I found 9 button cell batteries not working. Until I tried the 10th, then it worked.I am wondering how many cell batteries are not working from my purchase and how long they could last for those unused.