iPhone 12 battery draining fast

Returning phone(s) will for sure not solve the issue.

But at least, for people who can afford it, this allows to keep the opportunity to get refunded if a solution is not provided within an acceptable delay (each one will define the « acceptable » for his case).

In my case, I have bought my iPhone 12 Pro Max in late November so I can return it until the beginning of January 2021 and I will do it, one time at least and every 2 weeks after until the problem is solved if needed.

Thus, I will be able to get refund if I decide it and I will keep my 11 Pro Max which works perfectly. And even when the issue will be solved, I think I will return it and buy a « last » new one with a brand new battery which would have no useless extra cycles.

I assume it can seem selfish but Apple’s phones are enough expensive for them taking the responsibility of their errors...

I have lost 3% during the writing of this message... What a shame for Apple!

I had the same problem as everyone else. Its using the old charger it takes ages charging my i12 and drains the battery quick but if i use my new charger it charges quick and the battery lasts. You should let people know about this. I was watching Netflix while charging it with my old charger and the battery was just going instead or charging

Brand new iPhone 12 pro max and battery the completely drained after an hour phone call. The back of the phone was completely hot. Had on apple case and charged with apple power block and cords. Wondering if it’s worth it.

On my new day old 12 pro, I slept with 100% and woke up with 70% six hours later! The whole reason I switched from Samsung to iPhone was the hype about battery life and I cannot be any more disappointed!

I have the same problem. 20% lost in 8h. (12 pro, LTE, 1 sim, Congstar, newest software Versions I can get)

I hope it will be fixed soon with a software update, and I hope that we will not have to change the hardware!

Nobody's being unrealistic here. Every post here is based on actual experience with the phone. I mentioned here that I lost 2% of battery for a 1 hour call versus 10% loss for a 44m call posted by somebody. We're comparing experiences for the same use of the same phone but varying results.

Reran my night#1 test with replacement iPhone 12 pro Max, as initially could not tell the exact battery %. Discovered that when charging on my MagSafe chart the % was displayed. So, iPhone, out of the box, turned on at 22:00 last night (10-12-20), 98%. This morning 11-12-20 at 09:05 93%.

on a separate note, the MagSafe is really fast. Charged it with MagSafe while I went to brush teeth, shave etc....started off at 74%.....

My iPhone 12 is same status. Apple say that "iPhone 12 battery time is longer 50% than old iPhone" but this iPhone 12 battery time is shorter 50% than iPhone XR. Clearly, iPhone 12 has battery drain bugs

Apple must refund all money & present new iPhone 12(Don't has battery drain bugs ver) to iPhone 12 users. Then, must dismissal now iPhone 12 battery developers because they are so fool.

[Edited by Moderator]

I have had the same problem with the iphone 12. Same graphs and same drastic drain overnight. Even turned off WiFi to no avail.

I exchanged phone hoping it was faulty but replacement was only very slightly better. With no use, it still needed to be charged daily.

Gave up and exchanged for an iphone11 which hopefully is proven not to be so bad.

Frankly, the problems experienced with the 12 makes it unfit for purpose. My retailer agreed and refunded it all.

Here's my continuous testing of my 12 Pro Max both on standby and with light usage and how the battery has been behaving strangely and unpredictably. 

12/09/20

6PM - fully charged 100%

12/10/20

7AM - 100%

11AM - 99%

6PM - 97%

Note: on standby all day

12/11/20

6AM - 93%

12N - 90%

6PM - 83%

Note: with very light usage throughout the day. 

12/12/20

6AM - 53% What the 🤬?!

30% drain overnight after 2 days of consistent great battery? What gives?

This thread has been very helpful and insightful.

I recently ordered an iPhone Pro and almost went to pick it up when I discovered this thread. I immediately cancelled the order, thank god, and have (and will) be waiting to see how Apple responds. The more I read, the more it sounds like an iOS issue.

I have also never had these kind of issues with previous iPhones, regardless of model or anything else. Generally speaking, app updates will cause battery drain in my experience, but making sure that background app refresh is turned off does the trick for the most part.

I am still facing 4-5% drain (with everything turned off) BUT i got a call from apple and they said try restoring the device once and if the issue still persists we will REPLACE the phone!

Confused what to so as on the one hand many users are facing such issues and on the other hand various people on reditt say there battery is fine with no drain.

On Macrumors forum Someone said he lose only 1% overnight with 14.3 rc, while before 10-20%.

In my experience with 14.2.1 i lose 1%/h in stand by.

5-7% in 6-8 hours overnight.

11% in 40 min call.

Last night i lost 4% in airplane mode!

(I found it at 29 from 31%, but I did an hard reset and it falled to 27% in a while!)

Three nights in a row with 3G network I was losing 0%-3% overnight.

Last night I switched to LTE again, and lost 30%.

To me this is definitely a 4G issue, since all the other nights I was on 4G I had big drains

Same issue here with an iPhone 12 (64GB) bought less than a month ago.

Last night I disconnected from charger at 21:00, the phone ran out of battery at 4:00 next day.

7 hours of battery when idle, with only 3 background apps working: Fitbit (therefore Bluetooth on), WhatsApp and Microsoft Teams (these two had almost no activity during the night)

No dual sim, no 5G where I live, only 4G and Wifi.

I find it ridiculous that Apple has not address this after so many months and reports from users.