I agree with this. I read the article about the parasitic demand during charging and it being better to power it down during charging but that is not how the iPad is designed to work anyway. Anyone who has powered it down then plugged in the cord can tell you it boots back up and goes back into standby where it definitely pulls power.Originally Posted by AQ_OC
My compulsion is to keep it charged not to extend the life of the battery or even the tablet. I use reasonable precautions to keep it tip top shape but I bought it to use not sit in its original packaging surrounded by bubble wrap. For instance I think scratches to the back of the tablet are more likely than the screen so I don't bother with a screen protector.
I've been letting mine run down to about 30%, then charging overnight. So far, no real battery concerns.
The new batteries are lithium polymer so there are significant differences in characteristics.Originally Posted by bassman99
But this section of that article seems to relevant as they claim the lithium polymers have the same characteristics:Originally Posted by zphone
Simple Guidelines for Charging Lithium-based Batteries
A portable device should be turned off while charging. This allows the battery to reach the threshold voltage unhindered and reflects the correct saturation current responsible to terminate the charge. A parasitic load confuses the charger.
Charge at a moderate temperature. Do not charge below freezing.
Lithium-ion does not need to be fully charged; a partial charge is better.
Chargers use different methods for “ready” indication. The light signal may not always indicate a full charge.
Discontinue using charger and/or battery if the battery gets excessively warm.
Before prolonged storage, apply some charge to bring the pack to about half charge.
Over-discharged batteries can be “boosted” to life again. Discard pack if the voltage does not rise to a normal level within a minute while on boost.
Sent from my iPad3 using iPF
Originally Posted by drathbun
But they are never off in normal use. Also, unless I see some bench data that using them while plugged in is either a safety concern or causes a dramatic reduction in battery life I don't think I care. I doubt I use any of my electronics in absolutely ideal conditions/ways all the time.
Ok. I know this is about an iPhone but it relates directly to the battery discussion here. My son has an iPhone 3S and he just showed me what has happened to it. He has left it plugged into a Pioneer bedside stereo unit as his music machine (he has a new Windows phone as a phone). So basically, after being left in a charger that obviously does not turn off the charge, the iPhone 3S's battery as expanded to the point it has pushed the glass out the front and pushed out the back. It still works but does not hold a charge.
So the question is, if you leave your iPad in the charger (I assume the Mac 10w charger just keeps charging?), then your iPad will grow fat?
Sent from my iPad3 using iPF
Interesting. It probably depends on the type of battery involved. I've had my blackberry curved plugged into power everyday for the last two years....just a regular USB plug. I use it as an alarm clock.....no exploding battery or getting fat....yet. I'm now doing the same with my android phone....Originally Posted by drathbun
Now....speaking of rechargeable batteries and a charger ..... I left some batts in my charger to a while....and this nasty white crap came out....had to toss the batts and clean up the charger.
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The current iPhone and iPad batteries have a smart circuit that shuts down current to the battery when it gets full. That is built into the battery itself.
What you show happening is pretty unusual. Likely because one of the cells leaked oxygen. It's lucky it did not catch fire.