How long would a smart phone charge last, with no use?

[Hoonigan]

My iPad Air 2, which is over 3 years old now, and has never ever been switched off other than for software updates, still lasts me over a month on a single charge - with no battery saving tech going on. Wifi enabled, 4G enabled, sounds enabled...

[Zak33]

I don't have a sim card that I can use

Experiment re started this am
5/4/18 11:14am Full Charge, Wifi OFF....we shall see

[Zak33]

9/4/18 1:15PM UPDATE
84% Battery

[cptwhite_uk]

If it continues to deplete at a steady rate, looks like you're going to get around 25 days, not bad

[adidan]

Aye my old S2 has been in my draw after a reset and before deciding what to do with it. A month later it still had charge.

The biggest eater I find is just having a phone connected to wifi, be it being actively used or not.

[Zak33]

20/4/18 12:31 update
44% battery remaining

[Zak33]

25/4/18 10:23 am
23% battery remaining

[Hoonigan]

I wonder if it would be interesting to check the charge at the same time every day, then plot the battery percentage on a chart. If the line isn't straight, what caused that?

Surely it should be straight, because the battery drain will never change.

50% is exactly half of 100%, but is 50% battery exactly between the time of unplugging it from the charger to the time of death?

[wazzickle]

It might not be linear solely because the number reported is intentionally inaccurate, I've been led to believe.

[Ttaskmaster]

2 pages?
Charts and graphs?

Half tempted to do a similar thread, on how long it takes paint to dry... I'd bet on getting at least three Hexites thoroughly riveted throughout the thread, as well as half my company managers!!

[Gerrard]

I wonder if it would be interesting to check the charge at the same time every day, then plot the battery percentage on a chart. If the line isn't straight, what caused that?

Surely it should be straight, because the battery drain will never change.

50% is exactly half of 100%, but is 50% battery exactly between the time of unplugging it from the charger to the time of death?

Depends on what the drain is, whether it is constant current or power, or something in between. Cells are rated in Amp Hours (Ah), i.e. a 4Ah cell should provide 4A for an hour before dying. However, the voltage will vary between that period (normally max 4.2V and min 3.0V, but can vary on chemistry), and that discharge is not linear. Therefore, if you wanted say 4W, then you would draw <1A to start with and grow to 1.3A towards the end, meaning your SOC would discharge slower at the start and quicken at the end. Of course, manufacturers can counter that with software to allow for things like that to try and make it linear, plus they also are unlikely to run a cell to absolute max and min voltages (probably 20-80%) to maintain a higher cell life.

[Zak33]

2 pages?
Charts and graphs?

Half tempted to do a similar thread, on how long it takes paint to dry... I'd bet on getting at least three Hexites thoroughly riveted throughout the thread, as well as half my company managers!!

i'm tempted to run a long term torture test on anyone who uses a double T in their name, with jump leads and electroloyte, wasps, sunshine and a magnifiying glass... i think that would be great too

[Ttaskmaster]

i'm tempted to run a long term torture test on anyone who uses a double T in their name, with jump leads and electroloyte, wasps, sunshine and a magnifiying glass... i think that would be great too

Ooh baby.... !!
How much per hour do I have to pay for this service, anyway? Is it tax-deductible?


Seriously, though, is this not how they already established the manufacturer's quoted 'maximum standby time' for the manuel?

[Zak33]

Ooh baby.... !!
How much per hour do I have to pay for this service, anyway? Is it tax-deductible?


Seriously, though, is this not how they already established the manufacturer's quoted 'maximum standby time' for the manuel?

dunno, that's what I'm finding interesting

[Zak33]

Monday 30/4/18 10:15am

It just gasped it's last

I clicked the button to bring the screen up, it lit... and then went black

Wasn't with me over the weekend so I don't know when it actually dropped low enough to be useless but still.. that's some impressive battery life

5/4 to 30/4

[Gerrard]

So I would guess yours would be 24 days if it isn't connected to the network.

5/4 to 30/4

So I was pretty close.