Following a press release earlier this week discussing battery life on the iPhone, Apple has released some more details regarding how the tests were carried out.

Apple reveals on the iPhone spec page the following details about the iPhone’s battery.

  • 8 hours of talk time was measured on the 1900MHz band with WiFi network scanning turned off.
  • 6 Hours of Internet Browsing. Internet over WiFi testing conducted using a closed network and dedicated web and mail server, simulating browsing to 20 popular URLs and checking mail once an hour. All settings were default except: Call Forwarding was turned on; the WiFi feature Ask to Join Networks and Auto-Brightness were turned off; WPA2 encryption was enabled. Battery life depends on the cellular network, location, signal strength, WiFi connectivity, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary. Internet over EDGE testing conducted over a 1900 MHz EDGE, using a dedicated web and mail server, simulating browsing to 20 popular URLs and checking mail once an hour.
  • 7 Hours of Video playback was achieved by repeating a 2 hour 23 minute movie purchased from the iTunes Store. All settings were default except: Call Forwarding was turned on; the WiFi feature Ask to Join Networks and Auto-Brightness were turned off.
  • 24 hours of battery life playing audio was tested by playing a playlist consisting of 358 unique audio tracks, a combination of content imported from CDs using iTunes (128-Kbps AAC encoding) and content purchased from the iTunes Store (128-Kbps AAC encoding). All settings were default except: Call Forwarding was turned on; the WiFi feature Ask to Join Networks was turned off.