Hi everyone. sorry if this has been covered, but i did a search and can't find any info. I live in an apartment, but really want to be able to have the benefit of a buffer. Is anyone powering their buffer with a power inverter from their cigarette lighter? And if so, how much of a drain is it on the battery? I wouldn't want to use the buffer for 15 minutes and then have to get my car jump started. thanks in advance.