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0

Sounds like a bad battery to me. You can get a new battery and everything you need to change it at a website called iFixit for like $30 shipped, (don't worry, for a 4S, a battery replacement is super easy, it's just 4 screws and pulling the battery connector off of the logic board).


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Lithium batteries do not like complete discharge, so do it at 10% or higher. You can leave them as long you wish in the charger, it will stop charging when full. The battery charger it self has no limit on life time, yet again, it has to work harder if completely drained battery is to be charged. If for some reason you have to leave the batteries on the ...


1

That's not possible. Also, modifying a USB cable (as suggested in another answer) is a) probably not a good idea and b) probably won't even work (see this question & answer). Energy-wise, you are most likely better of by just using wifi for tethering.


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Not possible, you would have to physically alter the USB cord and remove the pins related to power and leave the data ones intact.


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Unfortunately you've tried everything... If there is enough power left to boot you could go to the Apple Menu > About this Mac > System Report > Power > AC Charger Information and have a look if it recognises the charger, and check the battery health. If this isn't an option because the battery is flat, or health is good and the charger isn't recognised. ...


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What type of cable are you using? I've seen similar behaviour with Poor quality third-party Lightning cables A poor quality USB charger I think there must be some form of 'leakage' which affects the working of the touch screen when using some sub-standard chargers/cables. I'd suggest either changing your cable or charger and seeing if that helps.


2

Your battery life is based on cycles, not so much what you use them for. Your battery has no idea if you are streaming music from your favorite service or your are crunching numbers to calculate pi to the nth digit or just surfing Stackexchange. The more draw you put on it, the more it is going to discharge requiring you to plug it back in to recharge it. ...



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