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This ability is only on jailbroken iPhones, 3Gs or newer. Its called BatteryDetective.
 
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You'd think the Istat app would do that if they could bleedin update it to work again. Haha
 
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Sorry. Bad connection. Trying to use my iPhone in the middle of the woods... Not sober. Hah

(Hence the accidental double post. Please delete)
 
Does BatteryDetective show you historical data like that though, or only from the time you install it? I couldn't tell from the details on Cydia.

Be nice if Apple actually included this info in Settings...sigh.
 
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You'd think the Istat app would do that if they could ****ing update it to work again. Haha
 
Does BatteryDetective show you historical data like that though, or only from the time you install it? I couldn't tell from the details on Cydia.

Be nice if Apple actually included this info in Settings...sigh.

It shows the battery's full history. Even after a fresh restore that isn't from a backup.
 
Does BatteryDetective show you historical data like that though, or only from the time you install it? I couldn't tell from the details on Cydia.

Be nice if Apple actually included this info in Settings...sigh.

It tells you how many cycles your battery has used and a bunch of other information you don’t find elsewhere (bootVoltage, temperature, etc.).

It also allows you to analyze apps that are running to see what kind of drain they are causing on the battery.

Edit: The max capacity and design capacity are really nice to have too, since it tells you how for away from design you are so that you can tell when you’re not going to get the battery life you expected.
 
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I just installed the app that Intell suggestion.
So I have 126 cycles with 96% health on my 3GS. iPhone is suppose to keep at least 80% health by 400 cycles, right?
 
I just installed the app that Intell suggestion.
So I have 126 cycles with 96% health on my 3GS. iPhone is suppose to keep at least 80% health by 400 cycles, right?

Yep. How old is your 3Gs, that cycle count seems a bit low. My launch day 3Gs has 650 cycles on its battery and is still at 92% of it original battery health.
 
Yep. How old is your 3Gs, that cycle count seems a bit low. My launch day 3Gs has 650 cycles on its battery and is still at 92% of it original battery health.

It's a replacement from Apple that I received sometime in September 2010.
650 is a lot. Haha.

I generally charge my phone every 2 days so that might also be the reason why I don't have that many cycles.
 
It's a replacement from Apple that I received sometime in September 2010.
650 is a lot. Haha.

I generally charge my phone every 2 days so that might also be the reason why I don't have that many cycles.

With that age and charging pattern, the cycle count seems accurate. 650 is a lot. Some days I put three full cycles on it, I abuse the battery like no other.
 
With that age and charging pattern, the cycle count seems accurate. 650 is a lot. Some days I put three full cycles on it, I abuse the battery like no other.

Oh, I should mention that it was a replacement from September, but I didn't use it until mid-November as a phone so it was just sitting in the box.

Your phone does prove how strong the battery is though. 650 cycles with 92% health for a 2+ year old phone is great, if I do say so myself.

It just shows that I have a bunch of life left on this phone. Too bad it keeps losing signal every now and then :( It's not a big deal, but would be nice if it didn't happen.
 
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