iOS 10.3.2 update drains battery

Mine is doing the exact same thing as yours. Only, update 10.3.1 was the culprit for me. Was just checking to see if it was safe to update again and I found my answer :(. I wish they would fix this issue.

Hey, well i followed your steps and downgraded my phone to 10.3.1 but its no use. It just instead heated my phone so much it was not charging or neither could use flash.

This issue has to be fixed in 10.3.3 or else we are screwed. 10 power banks a day is the new iphone generation.

This is what mine has been doing - in addition to the battery draining quickly like everyone else. After getting back on home wifi, I've moved my phone around (from laptop to USB to wall outlet) until I've found one of them to give it a little bit of a charge. Then I connect to my laptop where the backup is synced and restore to factory settings. I've done this 3 times now. Restore to factory settings and restore of backup fixes it for a few days.

Someone suggested it may be a carrier settings update for AT&T. I am on AT&T. Hopefully, they'll find a fix soon.

I've heard a lot of suggestions that this issue is carrier based. A lot of AT&T people... but my problems of loosing battery, quick discharge, over heating, etc...are all with Verizon! As with everyone else I changed NOTHING in my settings before or after the alleged "upgrade". This is an Apple software issue, plain and simple! Let's quit the blame game and suggestions for shutting off features that,quite frankly lead us to purchase the Apple product in the first place and get the "Genius's" working on an software fix.

I think the issue involves the new low battery mode algorithm or power protection circuit and older or defective batteries. Similar to an old/dying car battery, as it fails it loses cranking amps. You can open the car door and interior lights and tones will work, but if you try to put a load on the battery, (use the starter,) the amperage requirement is too high and the battery will not turn over the starter.

Power-Cycling

In the case of the phone, heaviest draw occurs on transmit not iOS loading... So when an application tries to access internet, or in the case of a incoming or outgoing call, or a cell site ping, the TX draw causes a dip in voltage, or amperage. The Active voltage/amperage protection sees the dip and forces a power-cycle. (Like a power dip on any computer power supply.)

Sluggishness

Since the introduction of low battery mode, iPhone will lower power draining processes, such as high backlight, and non-critical applications from TX/RX in the background. I also believe the processor can throttle or underclock to save battery. This effectively slows the processor and will cause applications to slow significantly.

Signs of battery defect

Unusually fast charging/discharging

Battery percentages that change irregularly

Battery going from 30% to < 5% in short time while using

Powering off @ less than 5%

Powering off @ any percentage

Symptoms of defective battery

Won't charge

Won't Power on

Excessive heat on discharge

Erratic battery percentages

Screen Dimming

Hangs

Sluggishness

Reboots

Loops

Broken LCD (Because your frustration will eventually lead to throwing the phone hard against walls/floors/apple display tables/etc.)

My example

With my iPhone 6+, if I try different aftermarket batteries, some just don't charge or will discharge quickly. Some defective ones will charge ok, but will cause weird symptoms. (Like the car battery example above.) Backlight will dim quickly, (a symptom of backlight low power mode.) applications will slow down, (a symptom of processor low power mode,) and the device will powercycle. (a symptom of low battery/improper voltage/amperage detection.)

This also make a lot of sense as to why we're reading about the iPhone 6s battery replacement campaign...

Dazedays - that's interesting. But, I had this battery drain, over heat problem with my "old" 5s! Before I realized it was the 10.3.2 update, I'd taken it back to Verizon and they "replaced" my phone with a "new" 5s (reconditioned I am sure) under an extended warranty contract. When I did the 10.3.2 update on the "new phone" ,lo and behold... the same problems started occurring. Now I could attribute the first issue, maybe to an old battery running close to it's life cycle... but both units having the exact same problem... I'm sorry I simply don't believe in coincidences. Still say this is a Apple Software issue!

Hello!

I have not read the 7 pages of responses, so this may have been answered....but I had the same problem. As soon as I updated to the newest version of iOS, my battery life significantly dropped. I went into Settings --> General --> Background App Refresh and discovered that it was turned on for every single app on my phone, even though I had previously turned most of them off. I turned them all back off (except for the few apps I do allow to refresh in the background) and my battery life is back to what is was prior to the update.

Hope this helps!

I too have had issues with my battery draining rapidly. It will be so low that it will shut itself down within a couple hours, even if I am not using it.

Since the 10.3 update my phone has to live on a charger; at work, at home, and in the car.

I've tried deleting content from my phone, closing out apps after each use, and limiting the use of my phone in general because of this issue but none of those have helped.

In addition to the battery draining rapidly, the percentage display sees to be off. My phone will indicate 1% battery life, but then when I plug it in, it instantly jumps from anywhere between 20-40%. Why the huge discrepancy? Also, my battery could be at 50% and then die. When I plug it in it will show the battery is in the "red". How did it drain from 50% within seconds?

This issue seems very common and apple needs to address it. At this point I do not want to even think about getting an Iphone 8 when it is released because I'll be ****** if I spend that much $$ on a new phone to have the same problems.

I'm having the same exact issue, very little use and my iPhone 7 is draining battery like crazy. I'm assuming it's a bug in the new iOS and they will come out with a new version very soon to fix this battery drain issue.

Yeah they should get 10.3.3 out soon to fix this battery draining issue I don't know since last 6 years I've notice when ever they launch updates like .2 .3 it's always mess

In iPhone 5s they did 7.1 and ****** the camera roll

In iPhone 6 iOS 8.2 was ****

In iPhone 6s iOS 9.1.2 had low sound and battery issue

In this one last update and this update both having battery draining issue :/

I just charged my phone to 100%. I have been off the charger for 10 minutes exactly and my battery is down to 82%. I just switched to power saving mode and I am connected to the wifi network. This is a bit ridiculous. I updated my phone yesterday morning and have had my phone go down to 10% three times in the past roughly 30 hours.

I have an iPhone 6S that's only 7 months old. I've never had any issues with it until after I downloaded the update 10.3.2. It was fine the first day, other than needing to charge it 4 times as often. Then that evening it shut off and made me do a hard reset to turn it back on. Then that was happening daily. Now on Day 5 it has done it to me 7 times so far and basically has to stay plugged in. This phone has worked perfectly up to now.

Why update - everyone knows after Steve Jobs died the saying now is "iT JUST DOESN'T WORK". Its not worth getting extra security patches if the phone bricks - every update since v9 hasbeen plagued with problems because apple not longer fully tests their updates but relies on its customer database to find the errors for them. Customer support has failed at the core within the apple corporation DO NOT UPGRADE AT ALL COSTS. Learn the lesson once and you'll have no moreissues

I've heard people blame at&t. Well I'm with Sasktel in Saskatchewan Canada. My phone was fine and now dies within 10 minutes of being unplugged. I can't take phone calls or do anything unplugged. I don't even bring it with me anymore. Absolutely insane this update isn't coming out faster

Good news, problem solved for me.

After updating the "Background App Refresh" and turning off all apps except the few I really use/need, under Settings -> Background App Refresh, my battery drain issues are gone. Applied updates on both my iPad Air and my iPhone 7 Plus.

Apparently iOS 10.3.2 defaulted all my apps on to do background refreshing.

For or what it is worth, my carrier is AT&T.

Not it sure this will solve everyo issues, but worked for me.