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tonester697

macrumors member
Nov 10, 2017
47
14
IMO if an iPad is on iOS 12 then 6-12% of drain in 24 hrs of standby is perfectly normal.
Not sure how that opinion assuages those of us who have reported experiencing daily drain of on average 15% and as much as 20% even when the device is in standby and/or doing nothing else (e.g., notifications, iCloud syncing) that might explain the seemingly excessive battery usage.

What I find hilarious (and possibly paradoxical) about your comment is that if that's what you believe, then why did you bother doing a DFU over your iPad draining 0.5% an hour? To refresh your memory:

"My Pro 10.5 was losing maybe 0.5% an hour on standby. Now it loses 0% overnight. If it’s 25% and I get up after 8-9 hrs, it’s still 25%."

So if my math is correct, 0.5% per hour drain equates to 12% over 24 hours so according to your own statement, such a drainage rate is "perfectly normal" yet apparently it wasn't acceptable in your case.
 
Last edited:

aakshey

macrumors 68030
Jun 13, 2016
2,932
1,385
Not sure how that opinion assuages those of us who have reported experiencing daily drain of on average 15% and as much as 20% even when the device is in standby and/or doing nothing else (e.g., notifications, iCloud syncing) that might explain the seemingly excessive battery usage.

What I find hilarious (and possibly paradoxical) about your comment is that if that's what you believe, then why did you bother doing a DFU over your iPad draining 0.5% an hour? To refresh your memory:

"My Pro 10.5 was losing maybe 0.5% an hour on standby. Now it loses 0% overnight. If it’s 25% and I get up after 8-9 hrs, it’s still 25%."

So if my math is correct, 0.5% per hour drain equates to 12% over 24 hours so according to your own statement, such a drainage rate is "perfectly normal" yet apparently it wasn't acceptable in your case.

Because prior to iOS 12 it didn't used to drain.

And I DFU restored 2 iPads, one was fixed. And the drain varies each day. Sometimes it's much more than 0 overnight.
 

tonester697

macrumors member
Nov 10, 2017
47
14
Update--so I'm currently running my drain test on my Pro after restore from backup but placing it in Airplane Mode; I checked up on my Pro yesterday (~2 days into the test)--so far drain is showing <1% usage (reporting 100% full but battery usage chart does show a very tiny green bar sliver on one of the two days, hence my saying <1%), compared to my previous no-Airplane Mode test last week when just two days into the test my Pro experienced almost 40% drain.

Granted this is just one test with my apps installed and device in Airplane Mode but clearly things are pointing to something related to Wifi (can't be GPS since my iPads are Wifi-only); although I won't absolutely rule it out, I don't think my Wifi network is the culprit since my two other iPads don't exhibit the same obscene battery drain behavior even though all three of my iPads were connected to the same Wifi network simultaneously--thus possibly narrowing things down to one or more Wifi-dependent apps doing its thing even though I made sure that there are no apps actively backgrounded. Guess I'll have to uninstall my apps one by one and see which one is the culprit.
 

eneisch

macrumors 6502a
Jul 11, 2008
803
293
I had the drain on my iPP 10.5 even with only built in apps (no 3rd party apps) installed.
 

Hrti

macrumors member
Nov 1, 2013
39
16
The iOS 12.3 update may have solved my issues somehow. Still early days though. I've only experienced 3-4% standby drain over 12hrs, which I consider "normal". This is while connected to the 5ghz network as well. The only thing I've done other than updating to 12.3, is unchecking the "auto-join" option for my 2,4ghz network.
 
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