We are on a second battery in 2 years - had my mechanic test out the system and he said the battery was dead but alternator was ok. I went to S__Rs to get my battery replaced under warranty and the alternator test failed with "Bad Waveform - Replace Alternator". Could this have been my problem all along? Maybe the alternator is killing the battery (the second one showed 4 V under load). The counter guy at S__Rs said to get a second opinion. I want to install a B15 alternator but don't know who to believe...