Help for iPhone batteries on continuous charge?

NT

OUCH! That's 4X what the phone cost. And not an answer to the question.

Not sure if it is a help to you, but my adult daughter has an old iPod plugged into a speaker box/charger which has been sitting on their kitchen counter and has been running for five or so years with no battery issues.

John :-#)#

Thanks, All my swollen batteries are in Android and Windows phones. Maybe Apple got it right.

I leave my iPhone 6 on charge overnight, and it is cool to the touch in the morning. It actually only takes an hour or so to charge...

John ;-#)#

I beg to differ somewhat: The reason you see more bulging batteries in Android phones is because there are 3 times more activated Android phones in service than iPhones. Also because the Android batteries are somewhat easier to replace in most Android phones (except HTC). Original batteries are usually good quality, but the replacements are not so good.

Hmmm. The manual for my Motorola phone explicitly says it can be left on charge. First symptom was failure of "torch" function. Then screen bulged out of the case. The bulging battery had disconnected the torch. The replacement battery is OK so far, but I don't leave it on charge for long periods...

Mike.

There are a couple of effects. Lithium batteries don't like maximum voltage, on charge or not. Degradation increases rapidly as voltage increases. If you charge then disconnect, the percentage of time the battery stays at that maximum voltage is SIGNIFICANTLY less.

Vendors maximize the claimed run time of their phones. They push it to the limit, and maybe past. Staying on charge is bad news.

Some devices charge to max, but internally disconnect until the battery falls below some level. Some devices allow you to set the maximum charge level. That lets them advertise big life numbers and blame you if your battery fails.

The stuff I buy at garage sales is old technology. That's why I think I need to take some action inside the charge system. Series diodes are the only thing I can think to do without a lot of proprietary info about how the charge controller works.

The pinout page shows several ways to disable charging. I've interpreted this to mean that it also forces it to run on internal battery. Some investigation might be in order to see if that's the case. Maybe a FET in series with the charge line that gets turned off when inserted into the speaker dock.

I'd merely have to charge the battery on a different charger occasionally to keep the battery from going completely flat.

I've got 2 ipods and 4 iphones 3, 3GS, 4, 4GS...and maybe a dozen speaker docks. Likely that they all charge differently. Making something compatible across the range will be a challenge.

I keep coming back to a pair of diodes to drop the max charge voltage and wondering whether the charge controller will tolerate that dead band in the curve.

The answer to overnight charging and bulging batteries is complicated.

Charging Your Phone Overnight: Battery Myths Debunked

I could question the explanations and suggestions in the article because battery chemistry, construction, chargers, charge controllers, BMS (battery management system), and phones vary over the years. The only advice I could add is to forget everything you know about older battery chemistries (NiMH, NiCd, Alkaline) because the various LiIon chemistries are quite different.

What would cause a phone battery to bulge in the middle? Over-simplification: Overcharging produces gases.

As many apps as possible should all be off when charging, too. That way, the phone is using less energy while charging.

Please explain why that would make any difference...

Mike.

I read it, here:

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(a helpdesk person at Apple or Samsung can explain further)

This explains better:

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This explains better:

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"How to close open apps on phone so phone will keep a charge longer? I am unable to drag icons to the top of screen

You do not need to drag icons. By tapping icons, you can only launch them. By tapping and holding icons, you can move them around, group them, or unin stall them. Double-press the home button to initiate the closing process. T hen, just tap on the application that you want to close and slide it upward s.

For a longer battery overall lifespan, do not discharge it fully and do not keep it charged at 100 % for too long. For a longer battery life between c harges

decrease the volume of the phone; closing applications may not affect the battery life, actually: to really c lose applications, you need to go to "Settings" > "General" > "Background A pp Refresh" and disable as many applications as you can. This will be the t rue way to "close applications"; in "Settings" > "Notifications", disable notifications for as many applicat ions as possible; in "Settings" > "Wallpaper & Brightness", turn off the "Auto-Brightness" op tion; in "Settings" > "General" > "Spotlight Search", disable "Siri Suggestions" and all of the "SEARCH RESULTS" options; in "Settings" > "Cellular", scroll down to the bottom. Disable "WiFi Assist ". I have a new iPhone 5S, and I need to close all of the applications. My bat tery won't go beyond 1/4th of a charge? I need to close my apps so I can charge my battery to a full charge,"

Replace the battery with a supercap capacitor.