The battery seemed to be not recognized by Dell. Once I put the battery in my Inspiron E1505, on booting the laptop, i got the warning message stating "Warning: The model number of the primary battery can not be recognized by Dell. The battery will not be charged." I spent almost 2 hours trying to resolve this issue. Whatever was it, I was highly upset. I decided to return the battery and I was lucky because the store provided me with the money back."