This battery is to be used for 4GB and 30GB models ONLY. Capacity: 3.7 volts, 2800mah. IF YOU HAVE A 20GB, 80GB OR 160GB MODEL, CLICK HERE
Note that this is a new improved version, which is smaller in size than the first version, but has a slightly stronger capacity. The exact dimensions of this brand new model are:
2.9" x 2.6" x 0.17"
75mm x 66mm x 4.5mm
This alters in no way its compatibility with any of the 605 players.