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#16 |
Wizard
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There's another article on ZDNet (http://www.zdnet.com/blog/hardware/w...;siu-container) that says the battery meter is behaving as it should. The last percentage of charging (usually above 95%) is essentially a trickle charge to protect your battery - and you - from damage. For some reason Apple chose to impose this trickle charge at a lower battery percentage. The article says that Apple will be able to tighten up the charging mechanism through a software update, but as long as you leave your new iPad plugged in for a bit longer, you should get the battery up to full capacity which can result in almost an extra hour off the charger according to Dr. Soneira.
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#17 | |
Wizard
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Quote:
![]() Edit: This comment now not accurate due to over eager mod editing... I do not support this statement and wish it to be deleted from this thread along with my other comments and references... Last edited by elcreative; 03-27-2012 at 10:05 AM. Reason: [moderation edit] |
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#18 |
Resident Curmudgeon
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I use Battery Doctor. It shows the full fast charge, the 100% to full charged and then the trickle charge. Also, it shows me how long is left of the current charge cycle. Plus, it can play a sound to let me know the charging is done. I have the trickle charge set to 30 minutes. Plus, it tells me when I should give the iPad a full charge. A full charge is one that starts from under 20%.
So when I charge the iPad or iPhone, they get a full 100% charge. |
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#19 | |
Lunatic
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Quote:
Last edited by dreams; 03-27-2012 at 02:27 AM. Reason: [moderation edit] |
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#20 |
It's about the umbrella
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#21 |
The Forgotten
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Can we get a "[moderation edit]" on that post...?
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#22 |
Wizard
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The first story was never presented to be a scandal. It's merely to point out that if you own an iPad3 you may want to leave it plugged in after the battery meter reads 100% because it is actually charged to around 90%. The second story says Apple will likely fix it with a software update so that when the battery meter says 100% it actually means the battery is closer to 100% and not 90%; meaning owners will get about an extra hour of run time before having to return the iPad to the charger.
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#23 |
eBook Enthusiast
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I wonder how many iPad owners actually do run the iPad down to the level where it gives a "low battery" warning? I never do - I think the lowest mine's ever got is about 20% charge.
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#24 | |
Wizard
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Quote:
Never heard of it. I see it's available for Android too. I'll give it try on my Viewsonic gTab which typically shows "fully charged" at 96%. Thanks for the info. |
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#25 | |
Wizard
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Quote:
Understand. I rarely let my own tablets get below 20% before returning them to the charger. However, when 100% charged means a device is really only 90% charged instead of 96-98% (end charge for most lithium batteries is typically 2-3% less than 100% and sometimes a little more) it means that the device will reach 20% much sooner than if it were actually charged to 96-98% and may even mean the battery is really at 10% when the meter says 20%. Plus, who wouldn't like to have an additional hour of use that Dr. Soneria claims users would get if the battery meter was more accurate. |
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#26 |
Fanatic
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This is so very much ado over so very little nothing. I feel like I must be missing something critical. Batterygate!? Is this really what passes for scandal here?
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#27 |
Interested Bystander
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Perhaps I'm missing something, but this entire discussion seems to be based on measurements taken from a single iPad?
Isn't it standard with Lithium batteries that until you've done a full discharge-recharge cycle the battery level display isn't 'trained' correctly, and won't display the correct figure? |
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#28 | |
Wizard
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Quote:
Normally the top out charge for each cell in lithium batteries is 4.2VDC which indicates 100% charge which in reality is normally around 96-98%. However, Apple limited the top out charge for each cell at somewhere likely between 3.9 - 4.1VDC which means the battery is really only charged to about 90% capacity even though it is reported by the battery monitor as 100%. |
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#29 | ||
Interested Bystander
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Quote:
That was about it being bad for the battery to keep topping it up. Quote:
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#30 | |
Wizard
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Quote:
I agree, the title could of ZDnet's story chould have been different. It's just a catchy headline to get the readers attention. The article is not really saying there is a scandal but merely that iPad owners are losing up to an hour of potential use time because of incorrectly reported battery charge percentage. In other words 100% on the battery meter does not mean your battery is 100% charged, it really means it's 90% charged. Imagine if your car's gas gauge said you had a full tank but in reality it's only 7/8 full. If you have a 20 gallon tank that's 2.5 gallons short. If your car gets 30 miles a gallon this means you can drive almost an extra 100 miles before fill up. If your battery is at 100% instead of 90% you get an extra hour of use before having to recharge. |
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