iPhone 4S battery life | iLounge Article

Article

iPhone 4S battery life

Author's pic

By Jesse Hollington

Social Media & Software Editor, iLounge
Published: Friday, October 7, 2011
Articles Categories: Ask iLounge, iPhone

Ask iLounge offers readers the opportunity to get answers to their iPod-, iPhone-, iPad-, iTunes-, or Apple TV-related questions from a member of the iLounge editorial team. We'll answer several questions here each week, and of course, you can always get help with more immediate concerns from the iLounge Discussion Forums. Submit your questions for consideration using our Ask iLounge Submit Form. We reserve the right to edit questions for grammar, spelling, and length.

View the complete Ask iLounge archives...

Q: I’m confused by the battery life on the iPhone 4S. I thought Apple had said that it has a better battery, yet the specs say that it gets a lot less standby time. However, it also has better talk time. How can the battery be better for talking yet worse when it’s just sitting there?

- Anonymous

A: There is a lot more to battery performance in modern electronic devices than simply the size or capacity of the battery. The chips and components all consume varying amounts of power depending on what you’re doing with the device, and improving battery performance is often as much—if not more—about making these components more efficient than simply shoving in the biggest battery possible.

For cellular communication devices, one of the most significant sources of battery drain generally comes from the radio equipment—the components that communicate with the cellular network, sending and receiving voice and data for calls, web browsing and so forth. This is why talk time is normally measured in hours while standby time is measured in days.

We don’t yet have any information on whether the battery itself has actually been improved in the iPhone 4S or whether the benefits come from the new wireless chipset and antenna system, but the fact that 3G talk time is the only number that’s improved suggests the latter. Most other battery performance numbers remain the same, with Wi-Fi Internet Use actually having gone down by one hour—from 10 hours on the iPhone 4 to 9 hours on the iPhone 4S.

The iPhone 4S does bring with it a much faster, dual-core A5 processor. Apple claims that the A5 has the “same low power consumption” as the A4, but that doesn’t mean that the power consumption is completely identical under all conditions. The A5 may consume about the same peak power as the A4 did, but may consume more power when running in a more idle state. Other components such as the Wi-Fi and Bluetooth chipset and additional RAM can also account for power consumption differences.

Note that it is not clear how Apple measures standby battery life, but this is also not something the average user needs to be directly concerned about. Even 200 hours of standby battery life equates to just over 8 days and it’s relatively rare for any iPhone that’s being used normally to last more than one or two days on a single charge. Theoretically the lower standby could relate to a shorter time between charges for the normal user, but since all typical usage numbers remain mostly the same, the standby numbers seem to instead suggest that the iPhone 4S simply uses more power when completely idle, as opposed to when it’s actually being used normally by most typical users.

The most asked question at iLounge.com:

How do I copy content from my iPod/iPhone onto my computer?

Converting DVDs, web video, TV shows and more:

The Complete Guide to iPod, Apple TV and iPhone Video Formats

Converting DVDs, web video, TV shows and more:

The Complete Guide to iPod, iPhone and Apple TV Video Conversion (Mac)

Converting DVDs, web video, TV shows and more:

The Complete Guide to iPod, iPhone and Apple TV Video Conversion (Win)

Best Speakers?

Best Headphones?

Best Case?

Best In-Car Solution?

Best Battery Extender?

Find more answers in the latest publications in our Library. Free downloads developed by the editors of iLounge!

Ask iLounge Archives:

1-24-14: Viewing only downloaded iTunes Match tracks

1-22-14: Splitting purchased content between two iPads

12-13-13: Non-Bluetooth Lightning dock speakers

12-11-13: Shared Apple ID and switching away from iPhone

12-6-13: Syncing multiple iCloud data with a family Mac

Read more recent Ask iLounge articles...

View the complete Ask iLounge archives...

« Buying iPhone 4S Unlocked

New features in iPhone 4S »

Related Stories

Comments

If you have a comment, news tip, advertising inquiry, or coverage request, a question about iPods/iPhones/iPad or accessories, or if you sell or market iPod/iPhone/iPad products or services, read iLounge's Comments + Questions policies before posting, and fully identify yourself if you do. We will delete comments containing advertising, astroturfing, trolling, personal attacks, offensive language, or other objectionable content, then ban and/or publicly identify violators.

Commenting is not available in this section entry.

Email:

Recent News

Recent Reviews

Recent Articles

Shop for Accessories: Cases, speakers, chargers, etc.