Instruct: Classify Amazon reviews into positive or negative sentiment
Query: If you are careful you can change the battery, but expect work

This item works. I purchased 2 for 2 ipods. Both batteries were dead. They have a decent life. I however left an ipod unattended for about 3 months after I charged it. It started dying, but I have charged and used until it is discharged and the time the charge lasts has gotten longer. You have to use it a few times to really get the battery working at full capacity. The video is pretty good. The tools will not work more than once or twice, and you must be very careful when working with your ipods. If you want to make it live a little longer is a cheap investment. I am sure there are other batteries but this one seems good enough.