iPhone battery testing methods revealed

Apple updated iPhone spec page revealing battery testing methods. When Apple announced the increased in battery life from five hours to eight hours of talk time, we asked how?

Battery

• Up to 8 hours Talk Time - see point 2 for testing details
• Up to 250 hours Standby - see point 3 for testing details
• Up to 6 hours Internet Use - see point 4 for testing details
• Up to 7 hours Video Playback - see point 5 for testing details
• Up to 24 hours Audio playback - see point 6 for testing details

Technical specifications are subject to change.

1. 1GB = 1 billion bytes; actual formatted capacity less.
2. Talk Time: Testing conducted by Apple in May and June 2007 using preproduction iPhones and software. All talk time testing was done connected to a 1900MHz network. All settings were default except: Call Forwarding was turned on; the WiFi feature Ask to Join Networks was turned off. Battery life depends on the cellular network, location, signal strength, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary.
3. Standby: Testing conducted by Apple in May and June 2007 using preproduction iPhones and software. All settings were default except: Call Forwarding was turned on; the WiFi feature Ask to Join Networks was turned off. Battery life depends on the cellular network, location, signal strength, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary.
4. Internet over WiFi: Testing conducted by Apple in May and June 2007 using preproduction iPhones and software. 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 by Apple in May and June 2007 using preproduction iPhones and software. 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. All settings were default except: Call Forwarding was turned on; the WiFi feature Ask to Join Networks and Auto-Brightness were turned off. Battery life depends on the cellular network, location, signal strength, EDGE connectivity, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary.
5. Video Playback: Testing conducted by Apple in May and June 2007 using preproduction iPhones and software. Video content was a repeated 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. Battery life depends on the cellular network, location, signal strength, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary.
6. Audio Playback: Testing conducted by Apple in May and June 2007 using preproduction iPhones and software. The playlist consisted 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. Battery life depends on the cellular network, location, signal strength, feature configuration, usage, and many other factors. Battery tests are conducted using specific iPhone units; actual results may vary.

Rechargeable batteries have a limited number of charge cycles and may eventually need to be replaced. See www.apple.com/batteries for more information.