Because my HD partitions table got corrupted and Disk Utility couldn't repair it, I have performed a clean install of Mac OS X Lion. Immediately after that, I have started to receive a "Service battery" warning and my battery capacity dropped suddenly from 98% to 67%. My battery is young (only 73 cycles) and was really lightly used. I strongly believe it is a software issue. Already tried some suggestions: Reset SMC by holding Shift+Alt+Ctrl and power button for 10 seconds Reset PRAM and NVRAM by holding Command+Option+P+R before gray screen appears That doesn't help. Please tell me, do you know how to fix the issue without reinstalling Lion again? Maybe SMC firmware reset?