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  • Apple Working on Method to Extend Battery Life


    With Apple coming out with devices that are both thinner in profile and more powerful, battery life is going to become even more of a concern than it is today. Apple's industrial design pretty much prohibits the idea of going with a larger battery, so the only option is to pack more power in a smaller space. This appears to be exactly the tack the company is taking, as a patent was revealed today showing a new charging method that would increase the capacity of a lithium battery.

    The patent, called "Increasing Energy Density in Rechargeable Lithium Battery Cells," details how a battery's gravimetric and volumetric energy density would be improved using a multi-step constant-current constant-voltage (CC-CV) charging technique. CC-CV in general involves charging at a higher initial constant current until the battery is almost charged, then the charging at a constant voltage until the charge current drops and the battery is fully charged. This patent involves breaking that down into steps: first charging to 50% with constant current and following up with a period of constant voltage, repeating in smaller and smaller steps until the battery is charged. Using this technique, Apple claims they can produce batteries with larger charging elements - thereby increasing battery life - while keeping charge time the same.

    CC-CV charging is not a new discovery, and one of the significant drawbacks with the technique is that it significant decreases battery life at lower temperature, with significant degradation at just 10 C or below. Also, leaving the battery attached to a traditional CC-CV charger can reduce the number of charge cycles through overvoltage. Apple's multi-step technique purports to avoid these obstacles by adjusting for either temperature or voltage using smart sensors.

    Though the mere existence of a patent doesn't mean Apple is going to implement the technology any time soon, it's worth noting that this patent was applied for in August 2009. So it's entirely possible that work on this project has continued, with improvements to come in the near future with a new generation of devices.

    Source: Electronista
    This article was originally published in forum thread: Apple Working on Method to Extend Battery Life started by Paul Daniel Ash View original post
    Comments 51 Comments
    1. garstie's Avatar
      garstie -
      Fantastic longer fun
    1. iAppleHack's Avatar
      iAppleHack -
      Thank God, when I'm multitasking on my device the battery life SUCK they needed too improve this a long time ago. See Apple is kinda getting it
    1. orozcoj4's Avatar
      orozcoj4 -
      This is absolutely necessary if Apple plans to use a Retina display on future iPads or if they increase the screen size on the iPhone. Everyone is already aware of the battery life issues that the Evo and the Droid x have.
    1. creasy425's Avatar
      creasy425 -
      this would be really nice for those (like myself) that use an animated weather widget...
    1. Zokunei's Avatar
      Zokunei -
      So is this software or hardware?

      Quote Originally Posted by creasy425 View Post
      this would be really nice for those (like myself) that use an animated weather widget...
      I just turned the animations off. The over the top snow animation made every other animation lag to like two frames a second :/
    1. creasy425's Avatar
      creasy425 -
      Quote Originally Posted by Zokunei View Post
      So is this software or hardware?



      I just turned the animations off. The over the top snow animation made every other animation lag to like two frames a second :/
      I was gonna do that. But then I read in a theme thread how to lower the snow/rain count. That made a huge improvement, dropped the lag to almost zero.
    1. klouud's Avatar
      klouud -
      Using a dual core in the iPhone 5 will increase battery life without any changes to the battery itself. With the iPhone 4 and Galaxy S sporting the best battery life(s) on the market at the moment, I can only imagine what is in store for us in Summer!
    1. Jahooba's Avatar
      Jahooba -
      Neat. What we need is a battery that charges in 20 seconds. Get on that one, Apple! We're eleven years into the future; let's make this happen already.
    1. mmaboi21's Avatar
      mmaboi21 -
      I love the iPhone 4 battery life.
      So anything More than that is outstanding.
    1. Zokunei's Avatar
      Zokunei -
      Quote Originally Posted by creasy425 View Post
      I was gonna do that. But then I read in a theme thread how to lower the snow/rain count. That made a huge improvement, dropped the lag to almost zero.
      I did that too (without any help ), but I like my lag to be zero
    1. delusion950's Avatar
      delusion950 -
      Its about time. All that money spend it on something useful.
    1. steve-z17's Avatar
      steve-z17 -
      Atta boy Apple
    1. ccoltmanm's Avatar
      ccoltmanm -
      Use the 3G off/on when your are in sleep mode.
    1. MetallicaFan1991's Avatar
      MetallicaFan1991 -
      My iPhone 4's battery is awesome, it goes over 7 days if I don't use it(I still get push email and notifications from various apps).

      It last 2 days when I spend 8 hours a day messing about like listening to music and browsing in Safari at the same time.

      Samsung Galaxy S2 has 1600+ mah battery in a thinner device than the iPhone 4, and the S2 has a quad core GPU, just saying...
    1. whereswaldo's Avatar
      whereswaldo -
      The current battery life of the i4 is huge, so they won't need to upgrade it this year
    1. Mbeck0265's Avatar
      Mbeck0265 -
      Isn't this what the Battery Doctor app does Now?
    1. onlinegamesnz's Avatar
      onlinegamesnz -
      Quote Originally Posted by whereswaldo View Post
      The current battery life of the i4 is huge, so they won't need to upgrade it this year
      Mines shocking. I get 1 day of constant use
    1. spazturtle's Avatar
      spazturtle -
      Quote Originally Posted by onlinegamesnz View Post
      Mines shocking. I get 1 day of constant use
      You think that's bad, I get 3-4 hours of light use, eg Safari or using the Music app alone with the screen locked!

      Longer battery life is always better, the more you begin with, the more you are left with after 2 years.
    1. Captinsmooth's Avatar
      Captinsmooth -
      Quote Originally Posted by Mbeck0265 View Post
      Isn't this what the Battery Doctor app does Now?
      No, a app on your phone is not gonna make electrical voltage changes come from the charger.

      This would be like a smart charger for say, it would work with senors in the computers battery and sensors with a small logic board in the charger. It would interpret density and temperature changes so it could adjust voltage and current being supplied to the device accordingly.
    1. steve-z17's Avatar
      steve-z17 -
      The battery in the iPhone is alright, it definitely could be better! If Apple wants to give us a better one in the iPhone 5 I'll take it!