I've had an issue a few times in the last couple days where my computer will start to get hot while browsing the internet, and drain the battery rapidly. I use Battery Health and normally my MBA draws about 7 watts while browsing in Firefox. When the computer starts to get hot Battery Health shows a drain of ~14 Watts. I've opened activity monitor and there are no programs using an excessive amount of processor - in fact there is hardly any load on the processor at all. Just for good measure I force-quit most of my running apps and the drain came down but only by 0.5 watt. Restarting fixed the problem. I'm assuming there is some background program (possibly flash) using a lot of graphics power but it is weird that there is no load on the CPU. Has anyone else experienced this? It's a 2012 MBA 13 i5.