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Battery Life

Discussion in 'Motorola Droid 4' started by DocWalt, Feb 13, 2012.

  1. DocWalt
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    DocWalt New Member

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    Is anyone else as impressed by the battery life as I am?

    I managed to make about 21 hours yesterday/last night with normal use, and a half hour of video viewing. So far today at work I've used 20% of the battery by now (bit past 11:30am), and I took it off the charger at around 7:30am fully charged. My D1 used more power than that, but it was overclocked to 1.1GHz.

    One comment about battery usage... WiFi is using a huge amount of power for some reason. Display has used about 26% and WiFi has used 21% so far. I know that % is of the 20% I've used overall so far, but that seems really high for WiFi usage. I've been sending texts/emails and a little bit of web browsing/gaming and I would have thought that the display usage % would be much higher. It seems to me that my weak4G signal uses less power since most of the time it's in 3G anyway.
  2. fingaz
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    fingaz New Member

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    yeah, WiFi is a HUGE battery drain. If you keep it off, the battery will last MUCH longer.

    I am def quite impressed with the battery. With all the playing around that I have done on the phone, I am surprised that it hasn't drained faster. So far so good!
  3. DocWalt
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    DocWalt New Member

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    I wonder why the WiFi is using such a high amount of battery? It never used more than 10% on my D1 and I only ever used the WiFi at home or work.
  4. Sparkimus
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    Sparkimus New Member

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    Maybe wifi is using a large percentage because everything else is more power efficient?

    Sent from my DROID4 using Tapatalk
  5. ezeddiekun
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    ezeddiekun New Member

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    The battery life I'm currently experiencing is a disappointment compared to my Nexus One. 5 hours of medium usage and its currently sitting around 50% battery life. My brightness settings is currently the lowest.. any ideas? Part of me thinks its because I played with it until battery depletion without charging on the first day..
  6. GuitarSkater
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    GuitarSkater New Member

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    I'm rather displeased with the battery life, it hasn't lasted long at all. I've had to set up different profiles to kill things, processes, apps, etc.

    Anyone have any apps/secrets to sustaining battery life? Aside from the bloat apps, I love this phone

    Sent from my DROID4 using DroidForums
  7. diablo85
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    diablo85 New Member

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    i did the same thing first day ezeddie, toyed with it first day out of the box till the battery was dead without charging it first. now i'm BARELY getting 7 hours from it, but i believe that was due to 3cx mobile device manager literally eating through the battery. battery use right now reports 6h50minutes on battery @ 20% with ~60 minutes voice, a couple of texts, light browsing, and 3 hours ago logging out of 3cx.

    i'm also using the profiles feature of android overclock to downclock the cpu to 300/300 when the screen is off.

    i'm in the process of draining the battery so i can report back on battery life after its received a full charge again...if its less than 10 hours with light to moderate useage, its back to vzw it goes.
  8. ezeddiekun
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    ezeddiekun New Member

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    Let us know how it goes Diablo.. might have to do the same on mine.. would they do replacements just because of poor battery life?

    Sent from my DROID4 using DroidForums
  9. debdroid1a
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    debdroid1a New Member

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    Here's a post with tips on battery life for the Droid 4.

    [h=3]New phones and batteries[/h]
  10. OUTthaWAZOO
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    OUTthaWAZOO New Member

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    I charged mine to 90% this morning, it's been off charge for 10 hours 45 minutes, I'm at 50% remaining right now, and I've probably sent 40-50 texts, downloaded a couple apps, used apps that require data for about an hour total, and made one short phone call. I'm perfectly happy with the performance of my battery.
  11. ezeddiekun
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    ezeddiekun New Member

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    When you have a verizon wireless service rep that turns the phone on without charging it to activate it then what? You would think they know their stuff..

    Sent from my DROID4 using DroidForums
  12. snowman
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    snowman New Member

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    +Remember guys you have not even had a full battery charge yet ,
    it won't take a full charge till ya run it almost all the way down about 5 times
    then it will actually begin to be a true full charge
    after that point then charge it and top it off as you like but about once a month kill it all the way
  13. FoxKat
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    FoxKat Super Moderator Staff Member Premium Member

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    What evidence do you have to prove this claim? I've found no research to back this.

    Sent from my DROID RAZR using DroidForums
  14. snowman
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    snowman New Member

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    I've been a ham radio operator 30 years it's pretty much common knowledge, I have good friends that own
    battery companies, remember who invented this and most radio and electronic technologies =Ham guys
    1 person likes this.
  15. tdpolo26
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    tdpolo26 New Member

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    BTW just an FYI matt a moderator on motorola forums was saying it might only be like 40 or 50 to replace which is kinda annoying to pay for but not terrible. Looking at the ifixit website there is a good chance someone will make a tray that a replaceable battery can sit in.... maybe even a huge one if someone wanted it. the tray would not have to be thick
  16. sweat90lx
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    sweat90lx New Member

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    OH LAWD! but you are probably right. My dad has been into ham for a long time also AE4OF. I remember when he was doing packet(?) and building diapoles(sp?) and other anntenas between pine trees. I also have a license but havent had a radio in years
  17. RoninX
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    RoninX New Member

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    After my first full day of use, I am very impressed.

    I charged my D4 to 100% overnight, and after 12 and a half hours of moderate use, I still have 60% charge left. That was after 10 hours on 4G and 2.5 hours on WiFi. This is with fully stock settings, automatic brightness, and absolutely nothing disabled. Touchdown was also polling for new mail all day, every 10 minutes.

    This answers my last remaining question about D4 performance: "Can I get through a full day of normal use without having to turn off 4G or put the phone on a charger?" The answer is a resounding "Yes!"
  18. FoxKat
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    FoxKat Super Moderator Staff Member Premium Member

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    Using the phone with a partial charge doesn't damage the battery. Nor does running it down to the point of powering off, as long as you don't make a habit of it. Charging it fully and draining it fully several times also doesn't increase the battery's ability to take a more complete charge. The battery will never take more charge than its first full charge. Each charging cycle will reduce its charging capacity slightly, and over time the cumulative effect is that the battery will hold less than it did initially, based on a percentage of rated capacity for a new battery.

    This is a Lithium Ion Polymer battery and its chemistry is completely different than either Nickel Cadmium, Nickel-Metal Hydride, or Lead-Acid. In fact, this battery's chemistry actually prefers multiple shorter charges throughout the day (either to partially replenish or to top off), rather than fully depleting followed by one long full charge. Deliberately draining and then fully charging in multiple cycles only reduces the lifespan off the battery by the number of cycles you put it through.

    Most manufacturers claim a maximum and minimum voltage of 4.23 and 3.0 volts per cell. Taking any cell outside these limits can reduce the cell's capacity and ability to deliver full rated current.

    For accurate and relevant information about LIPO batteries, go to http://batteryuniversity.com/learn/article/charging_lithium_ion_batteries.






    Sent from my DROID RAZR using DroidForums
  19. FoxKat
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    FoxKat Super Moderator Staff Member Premium Member

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    Sorry to disagree but I've done extensive research in the characteristics of Lithium Ion (and Lithium Ion Polymer) batteries and the scientific evidence, widely published - I might add, is the complete opposite.

    What you say holds true for Nickel Cadmium batteries to a certain extent if they've been abused for multiple charge cycles by not having been drained each time before charging, a phenomenon known as voltage depression or lazy battery effect. This results from repeated overcharging; the symptom is that the battery appears to be fully charged but discharges quickly after only a brief period of operation. In some cases, much of the lost capacity can be recovered by a few deep-discharge cycles, a function often provided by automatic battery chargers.

    LI & LIPO batteries don't suffer this effect and I can site many references that say to fully discharge and charge these batteries multiple times will actually negatively impact its useful life. Unlike most other rechargeable batteries, LI/LIPO batteries actually perform better over time if charged more often and in shorter charge cycles.

    There's enough information that can be learned from simple Google searches to prove what I state. Just search for "charging lithium ion batteries" to see for yourself.



    Sent from my DROID RAZR using DroidForums
  20. diablo85
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    diablo85 New Member

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    easy on the tone there, B. never did i say i would DEMAND a new one...but i'm certainly not going to deal with about 8 hours of battery life on a single charge, especially coming from my DX on liberty getting ~2 days of battery life on it with the standard battery.

    and...since its in these supposed "instructions," what book and page number did you get it from?
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