Si pone que es compatible con la Slim, es logico pensar que no es compatible con la clasica...
En cuanto a la duracion, una opinion del producto dice:
Putting this battery to the test indeed proved that it's battery life was inferior to even the 1200mah genuine Sony battery.
y otra:
Not worth US$ 10.90, totally useless. Battery life over 48, bullshit. I just throw 10.90$ away
De manera, que ya me diras....