The handsets used in the testing were an HTC Tytn II clocked at 400Mhz running Windows Mobile 6. There was also a brace of Android test units - an HTC Magic clocked at 528Mhz running Android 2. They dubbed this linger connectivity a 3G tail, noting that with Angry Birds , this period of unnecessary connectivity could account for up to 25 per cent of the app's total energy profile. Interestingly the team revealed that many apps with integral ads maintain the 3G connection for a period of up to 10 seconds after the apps has "closed", further draining precious battery resources. 0 and an HTC Passion with a 1024MHz chip running Android 2. The energy profiling was conducted by running the apps over a 3G connection. The testers created an energy profiler dubbed Eprof to test the asynchronous power behaviour of applications running on smartphones. They estimated that only around a fifth of the battery use was to actually power the game, with the remaining 80 per cent squandered on ads and GPS tracking to support location-based advertising.

Source: Inquirer