I'm actually very skeptical whether that many apps in parallel are a good battery test, and here's why: with that many apps, you're going to swap. Now, while that also consumes power, it's far less than what the CPU running 100% can consume - and as counterintuitive as it may seem, the CPU is twiddling it's thumbs waiting for pages of memory to come back from swap, so it's actually not doing that much. The worst case scenario should be closer to GPS on, 3G download, WiFi download, FM transmitter on, camera recording a video, and playback of some MP3's, just to get the speakers going... add possibly an accelerometer-using trinket to soak up any remaining CPU capacity. If the device is still alive doing all this, it should run out of batteries real quick