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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. Major Herbie's Avatar
      Major Herbie -
      Quote Originally Posted by AnthonyGiola View Post
      It wasn't "fixed" nobody ever said it was. AT&T would prolly sue somehow if Verizon got a fixed version but they didnt lol. Either way though honestly if you are walking around hugging your phone in your hands then you probably shouldnt be using a phone at all.
      The antenna was moved upwards in an effort to fix the problem, it also has GSM and CDMA chips i belive.
    1. AnthonyGiola's Avatar
      AnthonyGiola -
      Quote Originally Posted by Major Herbie View Post
      The antenna was moved upwards in an effort to fix the problem, it also has GSM and CDMA chips i belive.
      It was moved upwards to allow the CDMA/GSM dualmode antenna setup. Not to fix the actual problem. It was required to have the phone even be able to use the antenna (Verizon themselves modify the antennas before allowing manufacturers to make final release models).
    1. Major Herbie's Avatar
      Major Herbie -
      Quote Originally Posted by AnthonyGiola View Post
      It was moved upwards to allow the CDMA/GSM dualmode antenna setup. Not to fix the actual problem. It was required to have the phone even be able to use the antenna (Verizon themselves modify the antennas before allowing manufacturers to make final release models).
      Why does the US have only one network on 3G...? In Australia everyone has access to the 3G network so there is more competition and people pay less.
    1. Zokunei's Avatar
      Zokunei -
      Quote Originally Posted by Major Herbie View Post
      Why does the US have only one network on 3G...? In Australia everyone has access to the 3G network so there is more competition and people pay less.
      What are you talking about? All the US carriers have 3G and a lot have 4G.
    1. capufo's Avatar
      capufo -
      All carriers may offer 3G but only
      Around cities. Towns like wgere I live at don't get the full
      Service until 3 years after
      Ya city folks have it.
    1. santacruzlocal's Avatar
      santacruzlocal -
      Agreed ... The 4 Battery Life is way better than the 3GS, I don't know how much better it can get with getting "Bigger"
    1. Major Herbie's Avatar
      Major Herbie -
      Then why has the iPhone been with AT&T until now...? Also i don't understand what some US people are saying when they say they've got their iPhone on a line then they got another line. It's like their talking about a home phone that needs a phoneline attached or something.
    1. eddietah's Avatar
      eddietah -
      My iPhone4 4.2.1 battery is okay for me
    1. EskimoRuler's Avatar
      EskimoRuler -
      Quote Originally Posted by mmaboi21 View Post
      I love the iPhone 4 battery life.
      So anything More than that is outstanding.
      same here

      they would definitely have to make it work in lower temps and many people i know are those that leave there devices plugged in all the time so that wouldnt be good either
    1. xclusiveiphone's Avatar
      xclusiveiphone -
      Quote Originally Posted by Major Herbie View Post
      Lol
      I really wish they'd recall all the iPhone4's and replace them with iPhone5's a week before they come out just to compensate us for all the bullsh!t. They don't release the White iPhone4 for sh!t reasons but they release not one but two Black versions that don't work properly. It really p!sses me off sometimes
      Don't expect Apple to trade you a iPhone 5 for an almost 1 year old iPhone. If your still bitter about the antenna, then go get an android and get lost.

      Quote Originally Posted by Major Herbie View Post
      Then why has the iPhone been with AT&T until now...? Also i don't understand what some US people are saying when they say they've got their iPhone on a line then they got another line. It's like their talking about a home phone that needs a phoneline attached or something.
      You need to learn English because I don't understand a word you just said.
    1. Major Herbie's Avatar
      Major Herbie -
      Quote Originally Posted by xclusiveiphone View Post
      Don't expect Apple to trade you a iPhone 5 for an almost 1 year old iPhone. If your still bitter about the antenna, then go get an android and get lost.



      You need to learn English because I don't understand a word you just said.
      Yes, i need to learn english. P!ssoff d!ckhead