1. ganesha1991's Avatar
    Hi everyone.... got my nokia lumia 720 yesterday... salesman told me to charge the mobile first time for 8 hrs ... but within 2 hrs the battery was charged full .. i removed it in 3hrs.. is it necessary to charge it for 8 hrs.??
    if so can i do it now???

    Thanks in advance
    07-15-2013 12:56 AM
  2. khunhorm's Avatar
    No you don't have to. In fact what you should do is:

    Charge to full
    Use the phone until battery is less than 20
    Charge to full again

    Do this couple of time and after that, charge as you please.
    07-15-2013 01:50 AM
  3. ganesha1991's Avatar
    thank u
    07-15-2013 07:04 AM
  4. OzRob's Avatar
    No you don't have to. In fact what you should do is:

    Charge to full
    Use the phone until battery is less than 20
    Charge to full again

    Do this couple of time and after that, charge as you please.
    You don't need to do this either. The phone has a Lithium-Ion battery, so all you need to do is charge it fully before use, then charge as you please - no 'conditioning' necessary.
    07-15-2013 07:22 PM
  5. Trappiste's Avatar
    You don't need to do this either. The phone has a Lithium-Ion battery, so all you need to do is charge it fully before use, then charge as you please - no 'conditioning' necessary.
    Yes and no. Litihum-based chemistries do not give their full capacity before some of the higher voltage resistance is worn off by topping the charge a few times. It is unnecessary to run the battery down, though.
    07-19-2013 05:58 AM
  6. Coreldan's Avatar
    It is not even necessary to charge the phone to full as you take it out of the package. They usually come pre-charged at some half capacity, if you can manage the first day like that (many dont, cos they cant put down the new shiny phone), then just charge it overnight or something or then just use it on the charger for a while.
    07-19-2013 06:06 AM
  7. OzRob's Avatar
    Yes and no. Litihum-based chemistries do not give their full capacity before some of the higher voltage resistance is worn off by topping the charge a few times. It is unnecessary to run the battery down, though.
    Do you have some credible references for this?
    07-21-2013 07:27 PM
  8. Trappiste's Avatar
    Do you have some credible references for this?
    No links, sorry, only what engineers working with battery technolgoy have told me.
    07-23-2013 07:25 AM
  9. Bicpug's Avatar
    If it's anything like my l920 you should have to charge it and run it flat a couple of times before you see the true battery capacity.
    07-23-2013 07:32 AM
  10. OzRob's Avatar
    If it's anything like my l920 you should have to charge it and run it flat a couple of times before you see the true battery capacity.
    How many times does this myth have to be repudiated before it dies? Lithium based batteries such as the one in the Lumia 920 and Lumia 720 DO NOT IMPROVE AT ALL by charging/discharging. What does change over time is how often you fiddle with your phone, which decreases after the first few weeks and therefore battery life is increased because you don't always light up your phone screen every couple of minutes just to admire it.

    BTW, fully discharging a Lithium based battery and running it flat is NOT RECOMMENDED. This can actually damage these types of batteries. Lithium batteries should be plugged in and charged when they drop past about 20% charge remaining. The phone charging circuitry is designed to shut the phone down before the battery gets into its critical discharge phase, but some people keep turning the phone back on to really run the battery flat. Doing this runs the risk of pushing the battery charge below the critical threshold where it can't be successfully charged again in the normal way. To fix this you'll need to take your phone to a repairer. So do not run your phone completely flat if you can help it. And if you do run it until it shuts off, don't try to restart it without first plugging it into a charger.
    07-23-2013 08:26 PM
  11. OzRob's Avatar
    No links, sorry, only what engineers working with battery technolgoy have told me.
    Yes. I didn't think you'd have any links. I'm an electronics engineer (graduated in 1985 from the University of Sydney, Australia) and have worked with Canon's R&D centre for optical imaging technology in North Ryde, Sydney. My job was optimising power consumption for image processing DSPs to be used in things like SLR cameras - which used Lithium Ion batteries. In my experience, the capacity of Lithium Ion and Lithium Polymer batteries does not increase at all after a few charge cycles. My advice to anyone with a new phone is - just use it. Finicky charging-discharging does diddly squat for overall battery time.
    nitiny8 likes this.
    07-23-2013 08:43 PM
  12. michail71's Avatar
    Those Canon SLRs make great use of power. I'd trust this guy.
    07-23-2013 08:54 PM
  13. Prakash Ramalingam's Avatar
    Hi,

    i don't think that it's necessary truly. technically speaking
    If the capacitor can't charge over its limit or once it reaches its threshold, right
    it is just like "over flow"
    then what is the use of charging more than required
    06-16-2014 09:20 AM
  14. sharanra's Avatar
    I bought a new smart phone first i put in power plug then in two minutes the current went off or electricity supply was cut the mobile charge increased by two % so wat i should do know'
    10-15-2016 09:01 PM

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