iPhone 4S battery life
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.
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?
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.
- Will removing a credit card from Safari also remove it from Apple Pay?
- Can I mute Handoff calls coming into my Mac from my iPhone?
- How do I keep my iPhone calls from ringing on my Mac?
- Why doesn’t Traffic show up on my Today Notifications Screen?
- Why doesn’t my iPhone reconnect to Wi-Fi after I turn it on?
- Why can’t I see the iPad-style landscape view on my iPhone 6 Plus?
- Spotify penalizing artists who release Apple Music exclusives [Update: Spotify responds]
- Apple releases new round of iOS 10 and tvOS 10 betas
- Report: 2017 iPhone to eliminate home button
- Apple to add payment technology to iPhone for transit passes, Apple Pay in Japan
- Apple releases iOS 9.3.5 ‘security update’
- Report: Apple developing its own Snapchat-style social video editing iOS app
- Apple announces Apple Music Festival lineup including Alicia Keys, Britney Spears + more
- Universal calls an end to exclusives amid criticisms that Apple Music is hurting the industry
- Apple reveals some of its upcoming AI advancements for the iPhone
- Apple Music’s royalty rates complicate Spotify’s contract negotiations
- Western Digital My Cloud (OS 3)
- Distil Union Stanley Stand
- Philips Sonicare FlexCare Platinum Connected Bluetooth Toothbrush
- Audeze EL-8 Titanium Over-Ear Headphones
- Defined Corp Dome Stand for Apple Watch and iPhone
- Speck StyleFolio Pencil for 9.7” iPad Pro
- Audeze Sine On-Ear Headphone
- First Alert Onelink Wi-Fi Smoke + Carbon Monoxide Alarm
- Logitech Create 9.7” iPad Pro Keyboard Case
- iDevices Outdoor Switch Power Outlet
- Inside the betas: iOS 10 Photos gets Advanced Computer Vision
- Inside the betas: iOS 10 Music app delivers ‘clarity and simplicity’
- Inside the betas: iOS 10 Maps gets a major redesign
- Inside the betas: iOS 10 shakes up the user experience
- Inside the betas: watchOS 3 promises a real speed boost
- Inside the betas: A sneak peek at what’s new in tvOS 10
- Filling the Gap: A look at third-party HomeKit apps
- Instant Expert: Secrets & Features of tvOS 9.2
- Instant Expert: Secrets & Features of iOS 9.3
- Opinion: Why Apple needs a dedicated HomeKit app