New ipad battery depletion while plugged in
- Thread starter Ufo00
- Start date
L
Lunar
Guest
Thanks for the link, I had'nt read it actually, also since found couple of other stories on the net about it not being fully charged, when it displays 100%, though I suspect these battery percentage figures will likely not be 100% accurate, and perhaps should be treated similar to one's car fuel gauge.
In any case I'm sure the next iOS update will contain a few fixes... especially now customers have had time to play with them.
santoshsingh77
iPF Noob
I have the new iPad 3rd Gen (64 GB Wifi + 3G) and Iam experiencing the same problem. I think apple has given an underpowered 10W charger for the new iPad. Iam very unhappy with the charging part. It takes at least 8-9 hrs for full charge when it's not being used. If u use while charging, the battery slowly depletes
AQ_OC
iPF Novice
Whether it depletes or not while in use really depends on what you're doing and the brightness level you keep the screen at. Run the screen at 100% brightness, then you must expect that the battery will deplete. I put my screen on 100% brightness and didn't really do anything but let is be on...and the temp on the back got to 111 deg F in 36mins. So the screen, with all those 3 million pixels, can really draw a lot of power. And if you are playing a graphics intensive game too, with the screen on max brightness, the condition is even worse. But I also use my iPad for navigation using Navigon and with the screen at 40-50% with autobrightness on and music playing in the background, the new iPad can still gain charge.
Because I use my iPad everyday, at work and at home and in the car, I have a 10W charger in all of these locations. You can get them for $8 on Amazon, replete with a charging cable. I simply keep it plugged in whenever I am at my desk.
grouchomarx
iPF Noob
Unlike the AMOLED which doesn't use back light, iPad's current retina LCD screen replies on LED to provide the light. As you increase the brightness, the LED consumes more power. I really cannot understand why people b*itch about battery depletion/usage while in the same time give their LED the full blast...
L
Lunar
Guest
I can probably understand why someone may knock up the brightness a lot when in bright sunshine, but if inside the home where our's is mostly used, 40% is more than plenty for me, and is about the optimum for our ambient room lighting, I did try it up towards max and it really blows your head, almost to the point of being unwatchable, like having a bright torch shining in your face..lol.. but some people seem to think it looks better and prefer it high, so maybe some iPad3 backlights are simply brighter than others.. no idea.
Mine takes longer to charge compared to our iPad 1, but whether I'm streaming from the net, or watching a movie with bluettooth enabled, it still charges okay, certainly not had it taking more out than it's putting in... at least not so far anyway. Though I did notice after the last charge to 100% where it was left connected to the charger for a extra 1hr after reaching 100%, when the charger was disconnected it did seem to drop back to 99% within about 3 or 4 minutes, but after 1hr-10mins use its currently showing 95%.
Though it initially went back to 99% quickly, I think considering it was still 95% after 70mins use, that doesn't seem too bad to me.
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grouchomarx said:
First time poster, short time lurker... IPad3 64gb 3g.
Great thread. I have been having similar consumption issues. I had been shutting down services, bluetooth, cell data, gps enabled apps, location services etc. to try and isolate what may be consuming power so quick. Had not thought about the screen - the biggest hog in the unit - Doh...
Screen suitably set to 40%.
Now a question - if I leave autobright on, and drag the slider back does the autobright then try to maintain that leve or does it override and go full blast in bright sun? In other words is it all manual or all auto? Hmmm...
A friend says he has an app for his android that proactively manages power and suggests things to turn off. Is boost magic sophisticated like that? Would love to have something more than just the "gas" guage.
I also keep 10w chargers everwhere. In fact I noxed up and hid the iPhone chargers as ai periodically plug into the wrong one...
The extended cable ones are cool by the couch, the bed etc. There are some good aftermarket cigarette lighter ones I have on the boat, the car, my computer bag for when traveling etc.
<edit> PS - my PC does not have USB 2. During initial set up and syncing, about 20gb of photos, media, etc. I almost ran out of power on the ipad. It definitely discharges, or barely keeps up if you power with non-USB2 ports.
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6mildollarman
iPF Noob
beesknees said:
Yeah, I've noticed that also playing the game Infinity Blade 2, 100% brightness, almost max volume. iPad was at 30% when I started charging it. Played the game while charging, and an hour later, battery was down to 21%. I guess it depends on how hard the iPad is working during the charge. Seems that graphically intensive apps, higher brightness and volume will use up more juice than the charger can replenish.
G
Grytpype
Guest
It's normal. The iPad 3 eats power 70% faster than the iPad 2. iPad 3 with A5X processor (GPU power consumption doubled) + retina display (pixel density quadrupled) + max brightness + power-hungry app + Bluetooth + WiFi = power consumption > charge rate.
To ensure a similar battery life of 10 hours, the iPad 3 was given a battery with 70% higher capacity than the iPad 2 (42.5 Wh vs. 25 Wh). The same 10W charger therefore takes proportionally longer to charge it (~5 hours vs. ~3 hours).
So: why wasn't the iPad 3 given a 17W charger, to charge it as quickly as the iPad 2? Answer: heat issues. Cranking up the charging rate would lead to overheating.
BTW, the "explanation" in that Washington Post article is pure BS. The marketing guy obviously doesn't understand correct LiPo battery CC-CV charging algorithms, which require constant current (CC) until full voltage (4.2V) is reached, followed by constant voltage (CV) until the current drops to ~0.05C.
To ensure a similar battery life of 10 hours, the iPad 3 was given a battery with 70% higher capacity than the iPad 2 (42.5 Wh vs. 25 Wh). The same 10W charger therefore takes proportionally longer to charge it (~5 hours vs. ~3 hours).
So: why wasn't the iPad 3 given a 17W charger, to charge it as quickly as the iPad 2? Answer: heat issues. Cranking up the charging rate would lead to overheating.
BTW, the "explanation" in that Washington Post article is pure BS. The marketing guy obviously doesn't understand correct LiPo battery CC-CV charging algorithms, which require constant current (CC) until full voltage (4.2V) is reached, followed by constant voltage (CV) until the current drops to ~0.05C.
santoshsingh77
iPF Noob
Thanks for the explanation.... Cheers
Sonicrobby
iPF Novice
Ufo00 said:
Same problem, what I do is just lower my brightness, solves the problem.
Also the new iPad has twice the battery capacity of the iPad 2, but the same charger, so naturally, the new iPad will take twice as long to charge.
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