A new teardown of the latest sixth-generation iPod touch by iFixit -- a firm that sells repair tools and services -- has ranked the unit as slightly more repairable than the previous model, but continues to criticize the new device for things that would be important only to tinkerers, such as the lack of external screws and the use of adhesive to keep the device together. The teardown revealed some specifics on the new model, including a larger battery.