Yeah, you could, but it wouldn't charge much, you being at 94%. I'd wait until I was below 80% and then just go up to 90% charge. No need to overcharge. And I'd charge at superchargers instead of paying exorbitant prices for a few amps at a pay charger. As there are many, many superchargers all around San Francisco/Bay area/Marin/etc., just hit one of them on your way here or there. I can't tell if you're on a trip or something, but with 94%, I'd guess you've already answered your question by charging there, or you don't need a charge. As there are superchargers about every hundred miles or so, it shouldn't be a problem. Even if you have to make a long jump of 200 miles plus, if you'd bought range you wouldn't be worrying.