Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Unacceptable

I recently purchased this battery for my nano. When I got the battery, it came with cheap plastic tools used to open the ipod. The tools broke while I was trying to open the back. It took me over 20 mins to finally open the back metal part with a tiny screwdriver that I had. Soldering the battery in was a challenge. I wouldn't suggest doing this unless you have good technology skills. The battery held a charge for about a week, but it wouldn't hold a charge at all. I'm terribly unsatisfied at this product.