Sarna Auto exchanged our old battery which was rated 88 Amps, but gave us less rated battery in exchange. When asked, Sarna Auto said it does not matter, and refused to talk about it, now they answer in a most rude manner, and do not pick up the phone. It has been two months since they said they will send somebody - no body has come yet, and the generator is not taking up the load through the battery. read full review »