Why does the iPhone take so long to start up after it dies?

Cheryl/TidyMom wrote:

I was told at the genius bar that it's a VERY good idea to run your battery all the way down as often as you can. If you don't do this you shorten the life of your battery.

Say you charge it at 3% most of the time, eventually that 3% becomes your new zero....so then when you charge at 3% all the time again, THAT 3% (which is not about 6%) is the new zero and so on.

Nonsense. Lithium ion batteries do NOT have a memory effect. The only reason to run the battery down unil the phone shuts off and then fully recharge it is to calibrate the battery sensor. Either you misunderstood the Genius in question, or he is confused. Read Apple's official advice:

http://www.apple.com/batteries/iphone.html

rick marry wrote:

What I am saying is that the device should be usable the second the phone is plugged in, regardless of the amount of charge that the device had on the battery at the time it was plugged in.

All of this is doable with circuits and code.

It may be doable but I've never seen a smart phone that does it. It would also probably require a back up battery. As it is, there's barely room for all of the stuff that goes into an iPhone. An additional battery would displace something more useful.

Submit your feedback directly to Apple using the appropriate link on the Feedback page:

http://www.apple.com/feedback

Your "Vape"?

GB

It remains a mystery to me why people who appear to have access to a power supply let their phone die and then complain because it takes a little while to start up again.

I turn mine off every Easter, just for a moment mind you.

Shouldn't you be turning it off on Good Friday and turning it back on Easter? (Sunday school was a long time ago!).

If there are rules I have forgotten them (Sunday school was also a long time ago, and I rarely wasted a Sunday on it)

Apple has designed the charging system to handle many different battery usage events. Deep-cycles as Cheryl has described is not advised for a long-term usage plan.

Some recommendations from advisors in battery tech:

"Fully drain charge, then drain again and charge. Apple recommends this once a month for the health of the battery."

"Memory issues" are not valid where Li-ion batteries are concerned and in general is a bad practice."

Me personally, it all depends on if I am staying in the city or not... otherwise I turn off 3G and wait until I arrive in the next town.

Bauh wrote:

My friend has a Samsung Galaxy S3 and it powers up the instant she plugs it into a wall from a dead battery.

My Samsung Galaxay S3 takes about the same amount of time to power up as my iPhone from a dead battery. Yes, I have both phones.

I was wondering ,i have an iphone 3gs i was out of the house and my battery went flat i got back home and it usually takes about 3 hours befor it switches on , is that normal ? i mean what if i needed my phone for emergancies ?

A recent study has indicated that some types of lithium ion (lithium iron(II) phosphate) batteries do have a memory effect. Obviously it isn't as distinct as older battery technologies but it does exist.

http://phys.org/news/2013-04-memory-effect-lithium-ion-batteries.html

My guess and experience is that while li-ion batterys have little if no memory effect, they do seem to lose performance over time. In both respects, that they seem to take a bit longer to charge, but don't last as long.

This exact experience most recently I have seen on a gen 1 ipod touch. It works, but if that battery gets way down it can be awhile to get it back into a operative state.

I have a iPhone 4 & just recently I have started running into this problem where when I turn it off or restart it, it takes almost 10 or more minutes to turn back on! does anyone know why? PLEASE HELP!

Shorty, please make a new post on the forum. Tagging onto an old thread is not recommended if you want to get help.

When you make the new post, include the following:

iPhone Model

Your carrier

Reset Settings (yes/no)

Usage patterns.