When you’re away from home and working on an important business proposal, or thesis, that’s not the time to notice that your laptop battery is nearly dead. While battery life keeps getting better, AC adapters can still be a bulky mess to bring along. Dart scores a bullseye when it comes to this problem. The extraordinarily compact 65-watt near-universal adapter uses VHF technology developed at MIT to not only keeps your laptop powered, but can also charge USB devices. Alas, the MacBook requires Dart to take a novel and expensive approach that requires mating it with Apple’s MagSafe connector.. For others, $89 gets backers a Dart in their color choice with an expected delivery of November 2014.