Why does my iPhone's battery drain quickly?
The first thing you may want to to is bring your iPhone into an Apple store. They can help you determine if it's a hardware issue.If it's not a hardware issue, below are a few things you can do to preserve battery life.One of the biggest battery drains is screen brightness. To make sure your brightness is not too high, swipe up from the bottom of the screen. You should see this pop up. From here, you can turn down the brightness if it's too high.The screens below are all available from Settings:Now, you'll want to see which apps are draining the most juice.Apple has battery usage stats built into the OS.To see them:1. (first to to Settings, as shown at the beginning above) Go to Usage2. Then click "Battery Usage."3. Voila! You can see which apps are using the most battery.To turn off apps' ability to auto-refresh in the background:1. (from Settings, as shown above) 2. Then go to Background App Refresh. 3. From here, you can toggle indivual apps off, or just turn all of them off, based on what you just learned about which apps are hogging battery.GPS is also a huge drain. Some apps are on all the time pinging your location. To adjust your location settings, and restore some sanity on your phone:1. From settings, go to privacy2. Then, go to "Location Services."3. Finally, you can scroll through the list of apps using your location. I noticed that Dropbox was a battery hog, so I turned its setting from "Always" to "Never." (all Dropbox needs my GPS for is to begin a camera upload; not a critical function, I can just open Dropbox every once in a while to begin a camera upload).My last suggestion is to turn off automatic downloads, app suggestions, etc from the App Store.1. From Settings, go to iTunes & App Store2. I turned all of these off. No automatic downloads of music, apps, books, or updates will happen. And Spotlight will use less juice hunting around on the App Store. I left Apps alone; this way the spotlight can still find installed apps on my device.If anybody from Apple is listening, stop the madness!!!! Either spend more energy on getting better batteries to us, or have your UX and engineering teams handle more of this in the background. It's crazy how fast my battery drains without doing these things.
Why does iPhone battery indicator charge suddenly shoot up?
My iPhone 3GS seemed to be losing its charge more quickly. I went through Settings and everything seemed OK, except that autolock was not enabled. I set the autolock to kick in after a minute to dim the display, and since then the battery seems better. What I'm curious about though is that sometimes when I was charging it, the battery percentage would suddenly jump up at an impossible rate. Like it would go up over 40% instantly. Can anybody tell me what would have been causing this quirk with the indicator?
How many minutes is each battery percentage on an iPhone?
Well in the settings on my iPhone I have a battery app. It says I have 4 hours and 42 minutes of use since last charge and I have 17% charge remaining.So if rate of discharge is linear it's easy to see that83%=282 minutes = 3.4 minutes per %.Of course things are complex with batteries and you can learn more hereiPhone Battery Diagnostic App: Check Capacity, Discharge Rate, Health, More | Redmond Pie
How does a smartphone battery know what percentage it's charge level is at?
Well, first off, you can't just put a floating ball in the tank and measure where it is like the gas gauge in your car. It's way harder than that.Some phones (and laptops) use batteries and charging systems that employ a "coulomb counter". It measures the amount of charge that goes into and out of the battery. If know how big the battery is and we keep track of every electron that goes in and out, we know how full the battery is. These types may tell you to occasionally to let your phone/laptop discharge completely so they can "reset" the counter to make it more accurate. This setup is complex and relatively rare today.If your car has a display that shows your miles per gallon and range remaining, it works in pretty much the same way.Other phones/laptops have a much harder time estimating remaining battery capacity.The voltage in a lithium ion battery goes down very gradually as it discharges - think a pretty flat line on a graph that goes to the end and the drops off very quickly at the end When the battery is fully charged, it's about 4.2V, then during the discharge cycle it will go from 4.0V to 3.7V gradually, then poof it's dead and will drop quickly (I wish I knew how to insert pictures).The problem with simply measuring the voltage and estimating where you are on the line is that the voltage varies with temperature, current draw (are you running a complex app or is you phone in a call), and battery age. This makes the line move up and down. Maybe it'll be 4.1V to 3.8V or 3.9V to 3.6V, so if the voltage right now is 3.84V, where are we? So we add a thermistor (temperature probe) to the battery pack to help figure out what the line should look like and try to only measure when your phone isn't transmitting... And do the best we can. And that's why your battery remaining indication may jump around and not seem to make sense. It's complicated and hard...
How to calculate percentage of depth of discharge of a battery? ?
Full discharge means the battery is badly damaged. Ordinary lead acid batteries cannot be fully discharged without damage. reference has lots of data on this topic. It is NOT simple. The curve on the third page (numbered 68) is the best. But it doesn't agree with your curves, the 13.8 number is too high, unless the battery is being charged at the time you made the measurement. But it's low for that condition. But the voltage depends on the charge or discharge rate. At a very low rate of discharge, about 1 amp, the numbers from that curve are: 12.7 volts from 100% to 60%, where it decreases to 12.6. After that it becomes steeper. 100% 12.7 90% 12.7 80% 12.7 70% 12.7 60% 12.6 50% 12.5 40% 12.4 30% 12.3 20% 12.2 10% 11.9
Entry Level Discharge?
My friend is in the Navy and she has been recommended by a doctor for entry-level separation. They haven't told her wether or not it is approved. How long does the process take and what are the chances of it being approved or denied?
What should I do if my phone is reverse charging?
I believe you mean to say that your battery is discharging when you connect it to the charger. It really means that your battery is discharging. Simple thing you have to understand is current flows from higher voltage point to lower voltage point.If the supply voltage is higher than the battery voltage, current flows into the battery and the battery charges. If the supply voltage is less than the battery voltage, then the currrent flows from battery to the charger and the battery discharges (reverse charges). The second case happens very rarely. Generally if you try to charge your phone through laptop or computer USB port this happens. Sometimes the USB port supply voltage is less than the battery voltage and your battery discharges. So, it is better to charge battery from wall inlets (230v mains) using your phone charger.
What does 87 percent blood oygen level in copd pt mean?
Have her do some cough and deep breathing exercises. She may need to expand her lungs, to get rid of some mucous, or fluid that nay have accumulated in her lungs. She should do these exercises every one to 2 hours while she is awake, 10 times. Is she on oxygen now? She may want to bump up her oxygen to 3 liters, do not go above that/ with COPD patients if oxygen is given to high it causes that part of the brain that tells you to breath to shut down. If she stays below 90 percent, or if she is having difficulty breathing, unable to catch her breath, showing signs of hypoxia such as changes in level of consiousness/ changes in mental status/ blue lips/ blue nail beds call 911. When in doubt call her DR.
Why while charging a smart phone, it gets charged soon till 90% and rate of charging decreases after 90%? Why does this happen?
Actually the rate is slowed significantly once you reach 80 percent(provided you are using the charger your phone came with and then again when it reaches 95 percent but actually it is slowing down once each percentage is crossed but only significantly at about 80 or 70 percent depending on if you are using the original charger if you are chaarging using a computers USB port it offers only 500ma of current so you may notice the drop in speed of charging when you reach 85 percent only. Now for the answer your phone must be using either Li ion or NiMh batteries and one problem about these batteries is that once it reaches closer to full charge if the charging current is not reduced it leads to release of gases which expand the battery and can even cause it to explode your phone and kill you or disfigure you. To prevent this your phone is charged in a 3 stage or 2 stage charging method where from 15 percent to 70 percent a lot of current is allowed to enter your phone 1000ma in phones while usually 2000ma in tablets. Once it reaches 70 percent it reduces charging rate and thus tries to stop any damage due to expansion of battery by gassing and this is further reduced once it reaches about 85 percent where the charging current is further reduced. And after this the current drops slowly and charging from 99 percent to 100 percen takes the most time. Now if this multi stage charging method goes faulty or too much current is drawn something is bound to happen. In this context if you want to make sure your battery last for long like 10 or more years you should only charge till 80 percent with a low speed or like 20-30 years then you should charge till 60 percent or so however this will reduce the backup of your phone so you may not prefer it. Also most of these batteries will last with enough capacity for 3-5 years and you may have to replace it then.