# How to see real capacity (live?) the battery of an iPhone?

The battery quickly sits down. I think to replace it with a new one. It makes sense, if the capacity is much lower than the nominal.

How to check capacity?

If she is now from 1100 1440 somehow makes no sense to change. But if 800 of the 1440 will be replaced.
September 19th 19 at 12:45
September 19th 19 at 12:47
1)Work up to full charge, when it comes, and will turn off the phone, measure the voltage at the terminals after connecting a load equivalent to the phone.
2)Charge fully.
3)Connect the load equivalent to the phone accurately measure the current consumption, note the time and wait for full charge. The time of full discharge is considered to be the achievement of the voltage measured in 1.
4)Knowing the load is discharged, and accordingly the discharge current and discharge time multiplied these values and get these the most amp/hours, or milliamp hours as you want.

On the load is equivalent to the phone - a smartphone with a battery 1.5 A/h work on average 10-20 hours,
accordingly, the average phone requires of the order of 0.15-0.20 A/h, that's a load and needs to be defused.
Ie a trivial resistor value can be calculate by Ohm's law.

Just a question - why are all these measurements and calculations if you can just estimate how many rests the phone on a fully charged battery?
Of course the figures are not as accurate, but they will be of great practical value, namely, to show, do you have enough current capacity or not.
September 19th 19 at 12:49
to download the program iBackupBot. When you connect your iphone to the computer, the details of the device shows the current capacity
Downloaded the Mac trial - this is not there. Need the full VIN? - Laila.Simonis commented on September 19th 19 at 12:52
: there are hidden. https://www.dropbox.com/s/aopro12pcw8hq5e/Screensh... - bernita_Friesen65 commented on September 19th 19 at 12:55
in the trial version of moar no. - Laila.Simonis commented on September 19th 19 at 12:58
here's where to get a working version and free - I do not remember:) but I have trial shows. version # 5.2.6 - bernita_Friesen65 commented on September 19th 19 at 13:01
the Mac is not set, but to use the laptop even with a fresh iBackupBot shows the current battery capacity as a trial period, just checked.
directly under the picture of the iPhone you need to click on the link "More information". - blake commented on September 19th 19 at 13:04

Find more questions by tags Rechargeable batteriesiPhone