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Tips Samsung Galaxy S2 + Energizer XP8000 battery pack

Discussion in 'Android Devices' started by connectandroid, Jun 5, 2011.

  1. connectandroid

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    Hi guys

    First time Android user with Samsung Galaxy S2 stock KE2 Optus Australia branded phone right now. Have yet to flash to KE7 but getting ~9 1/2hrs normal usage.

    With Juice Defender free version installed and wifi enabled get around 17-19hrs normal usage or around 9 1/2hrs with 6+ hr session of Angry Birds.

    Galaxy S2 is on it's 6th charge right now - first 4 charges let it run down to around 44%, 5th charge ran down to 16%.

    Anyway, I have an Energizer XP8000 - 8000Mah battery back I use for my Acer 3810T Timeline notebook and it has a CB31 tip for Samsung Galaxy S so I assume it works for Galaxy S2 as well.

    So going to test it out and thought I'd keep my progress updates in this thread for others to read as well.

    The test subject - brand spanking new Samsung Galaxy S2

    [​IMG]

    Energizer XP8000 Tech Specs:

    • Battery Cell: Lithium Polymer
    • Power Capacity: 8000 mAh
    • Rated Input: DC 12V, Max 3500 mA
    • Rated Output:
    • DC 5V, 1000 mA
    • DC 10.5V, 2000mA
    • DC 19V, 2000mA
    • Recharge Time: ~4 Hrs
    • Weight: 0.5 lbs / 0.22 kg
    • Dimensions: 4.3(L) x 2.9(W) x 0.9(H) inches / 11(L) x 7.3(W) x 2.3(H) cm

    XP8000 Tips

    1. AB03 tip = Acer 3810 Timeline notebook
    2. CB31 tip = Samsung Galaxy S/S2

    [​IMG]

    [​IMG]

    From label you can see it's rated at 30WH.

    Question: Is it a valid way of testing to connect XP8000 to Galaxy S2 and use phone to see how long it lasts ??

    Feel free to chime in and share your own results with external or extended battery packs with Samsung Galaxy S2 :)








    --------
    Results are in for Samsung Galaxy S2 paired with Energizer XP8000 8000mah external battery pack. The phone has the stock Optus Australia apps and branding still on it.

    Definitely looks good just pushing total uptime on stock Samsung Galaxy S2 Optus Australia KE2 firmware (unrooted waiting for 2.3.4 at least) to ~52hrs with 6% battery life remaining! Which is 5.47x times more battery life that Stock S2 KE2 and 2.6-4x times more than with Stock S2 KE + Juice Defender.

    Results
    • Stock S2 KE2 = ~9.5hrs
    • Stock S2 KE2 + Juice Defender free version = ~13-20+hrs
    • Stock S2 KE2 + Juice Defender free version + XP8000 = ~52+hrs

    Setup
    • ADW Launcher homescreen based
    • Brightness = 0-10%
    • Optus Live wallpaper changed to normal wallpaper
    • Wifi Enabled = all the time connected to VOIP
    • GPS Disabled
    • Bluetooth Disabled
    • Background Sync Enabled
    • 3x IMAP email accounts checked at 1hr, 4hr and 6 hour intervals respectively
    • Server Monitor app = checks 2 servers uptime every 30-60 mins and logs results
    • Angry Birds = ~6.5hrs total play time
    • Music = ~3hrs total play time
    • Web browsing and Android Market browse/downloading via wifi

    Break down

    * Less than <50% battery life = enters into power saving mode

    Day 1:
    • 1:01 AM - 100% Full charge
    • 1:49 AM - 4:49 AM - tried leaving XP8000 connected after 100% but seems it stops charging after 100% so rest of tests removed XP8000 after charged to 100%. But graphs still report S2 being connected to USB/power.
    • 5:06 AM - @58% rate of power usage ~170mah - 1st XP8000 charge up started
    • 6:44 AM - 100% charged via XP8000 @ ~425mah
    • 2:39 PM - @24% rate of power usage ~320mah - 2nd XP8000 charge up started
    • 5:59 PM - 100% charged via XP8000 @ ~377mah

    Day 2:
    • 6:20 AM - @15% rate of power usage ~114mah - 3rd XP8000 charge up started
    • 9:04 AM - 95% charged via XP8000 @483mah, XP8000 emptied no more reserve power [Uptime: ~32hrs ]

    Day 3:
    • 5:02 AM - @6% rate of power usage ~74mah - 4th XP8000 charge up started [Uptime: ~52hrs ]
    • 8:40 AM - 100% charged via XP8000 @427mah - was asleep for this one so it's approximate time based on battery graph here.

    The XP8000 is rated at 30WH capacity, so not sure of the maths as it seems 8000mah fell short in expected amount of extra battery life if you go by the software graphs (yeah probably not entirely acrurate).

    Day 1 @100%

    [​IMG] [​IMG] [​IMG]

    Day 3 hitting 6% battery life left

    [​IMG]

    [​IMG]

    [​IMG]

    [​IMG]

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    [​IMG]

    I'd imagine with KE7 or 2.3.4, I'd be pushing 60-80+hrs with S2 + XP8000 ?

    On a average 8-12hr work/away from home day, with KE2 firmware you'd be running 1-4hr deficit per day (need to use 8hrs of XP8000 reserve power). So with 32 hours provided by XP8000, you could end up only charging Samsung Galaxy S2 every 4 days via mains AC adaptor (longer with KE7/2.3.4 firmwares I guess). So could hook up S2 to XP8000 at work, away from home, in the car etc I suppose.
     

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  2. Tombo

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    I have the Energizer XP18000. Is it normal that the tip CB31 has a loose contact on the Samsung Galaxy S2?

    It often disconnects.

    Thanks, Tom
     
  3. duc916

    duc916 Well-Known Member
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    Here's a "tip"... get a 16000mAH i.Sound Portable Power Max and use your factory cables.
    2400mAH max CHARGING current FTW. It'll charge my iPad2 from 50 to 100% in a little over an hour. For anyone experiencing less than stellar charging times with their factory SGS2 charger, this is your solution.

    [​IMG]
     
  4. connectandroid

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    that ain't normal, my CB31 fits perfectly like the stock charger tip

    i recall S2 label under the battery says ==1000mah so is that max it will charge at ? The stock charger charges at 700mah.

    I thought the reason Samsung limited stock charger to 700mah is for better battery conditioning/life as charger too fast prematurely kills battery life over time ?
     
  5. duc916

    duc916 Well-Known Member
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    Got me...I'd always assumed charging current was device-side limited.
     
  6. duc916

    duc916 Well-Known Member
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    I do remember reading that all Li-ion battery packs are supposed to have built-in fail-safe mechanisms i.e. voltage/temperature monitoring/interrupt circuitry. Basically if you successfully charge with a high current charger and your battery didn't die in the process, you're okay. No problems with any of my devices. Not that I worry about it. Batteries are cheap enough and they'll likely outlive the device before it gets upgraded.
     
  7. connectandroid

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    So far so good with XP8000 charger works.. but can confirm S2 is only taking 700mah per hour even though XP8000 can do 1000mah
     
  8. connectandroid

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    Results have been updated in 1st post - how's 52hrs uptime usage on S2 + XP8000 with stock KE2 firmware.

    [​IMG]

    [​IMG]

    [​IMG]

    I'd imagine with KE7 or 2.3.4, I'd be pushing 60-80+hrs with S2 + XP8000 ?
     
  9. Gearu

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    8000Mah + 1650 Mah = over 9000 :D
     

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