This battery is to be used for 20GB, 40GB, 60GB, 80GB and 160GB models ONLY. Capacity: 3.7 volts, 2800mah. measures: 3" x 2 1/2" IF YOU HAVE A 4GB OR 30GB 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.