How many battery cycles is the iPhone 3G good for?

iemploy

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#1
I use my iPhone every day and drain/charge it a few times a day. Basically it is always on. Just out of curiosity, how many cycles will the battery take before it isn't holding a charge anymore? Once it dies, what are the costs of getting another battery put in?
 

psylichon

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#2
Just off the top of my head, I think both versions of iPhones' batteries are rated for 400 charge cycles with a cost of about $70 to replace?
 

acosmichippo

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#3
401, Bob!


Wooooooooooooooooooooo!
 

iemploy

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#4
Wow... Thats impressive.
 

iemploy

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#6
I usually try to make sure I charge it full and drain it completely. Am I doing the right thing?
 

psylichon

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#7
I usually try to make sure I charge it full and drain it completely. Am I doing the right thing?
You don't need to. In fact, the iPhone's lithium polymer battery doesn't like to be fully discharged. That's why it will turn itself off with at least 5% battery left. Discharge it fully once a month or so for maintenance, and charge it fully when you do, but otherwise charge your battery whenever and as often as you like.
 

Europa

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#8
Yeah, I've heard that it's best to try to keep it "topped off" as much as possible rather than letting it run down to the red.
 

iemploy

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How bad is the cold on it? For the last few days were around 10 degrees. I never leave it in my car assuming it would be bad on it.
 

psylichon

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#10
cold isn't nearly as bad as heat. Though I'm not sure what the safe lower limit is, to be honest.
 

talon90

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The battery will have a "life" of about 400 complete charge cycles. Meaning it can charge 400 times from empty and still maintain 100% of its life. So, if you run your battery down to zero every day and charge it back up over night after 400 days of doing this your battery will drop to about 80 percent of its charging capacity and decrease from there over time. If you did the same thing but only used 50% of the battery everyday that you did this and charge it back up over night then you could do this for 800 days as you would only be using one half of one charging cycle each day.

Apple does recommend that once per month you charge your phone to 100%, discharge it to 0% and the fully charge it back up.
 

rattlhed

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#12
So I've had my iPhone for about a month now, and I do want to keep the battery nice and happy, so I went ahead and completely drained it and then fully charged it. Section done...

However, what really amazed me is how hard it was to drain the battery. That seems to be the complaint of some people (short battery life), however, I really had to use and use and use my phone to get the battery to fully drain. I had Pandora radio going for about 5 hours (off and on while at work), checked my email often, did a little web surfing, and played some games in the evening. It finally shut off, but I was quite happy on how long I was able to use it before it ran out of juice. Even when I thought I was getting close, it just kept humming along.

Just my $.02
 

psylichon

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#13
If you want to drain the battery quickly, turn off auto-lock, open the camera app, and aim it at something bright white.
 

iemploy

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#14
Nice. I'm hoping to keep my battery lasting as long as I can. We don't have any Apple store anywhere around if I'd have to get a battery change.
 

jareknyc

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#15
guy for how many reacharges this thing is good for?
 

Hawk

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#16
Actually Cold is bad all around. The battery can take the cold a little, but the more cold the more it can be affected.
Cold for the phone is bad because if you freeze anything and then start using it, you can create condensation within the phone and cause some serious damage.
If your phone is ever left in freezing temps, the only advice I can give is to treat it like it got wet and let it get to room temp in a bag of rice. Trying to turn it off is the same as using it. Better to leave it asleep.
 

iemploy

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#17
haha... well heat won't be a problem since I live in PA! haha
 

jafundy

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#18
Battery

has anyone had the battery replaced? What is the process? I know you have to take to Apple. do they do it in the store or keep the phone? Do you get a loaner?
 

Hawk

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#19
If your phone is under warranty, then you make an appointment with Apple, and take it in. They should swap the phone out if they find that your claim of poor battery life are valid.