You can try a different one, or even someone else's charger, but I doubt that's the problem. (A bad cable shouldn't give you the indication you're getting. Try using a soft-bristled brush or a can of compressed air to remove any debris from the charging port. ( GSam Battery Monitor makes it easy - set an alarm for 81% on the high side and 39% on the low side and let the phone tell you when to charge it and when to unplug the charger.) The charging port on your Android phone can become clogged with dirt or debris, which can prevent the charging cable from making a good connection. We just have to learn how to use the batteries properly. (Okay, for nit-pickers, hydrogen is, but the refrigeration plant to keep an ounce of hydrogen in the metallic state would weigh a few hundred pounds.) A lead-acid battery could be fully discharged and fully charged over and over (look at the abuse car batteries take), but you don't want to carry 6 ounces of lead around with you, so we use lithium. We use them because the electrodes in batteries have to conduct electricity, and lithium is the lightest metal. You might need to charge for up to an hour. If your phone doesn't turn on, follow these steps to check your hardware and charge your phone. Press and hold the side button until you see the Apple logo. Press and quickly release the volume down button. Lithium batteries are not deep-discharge batteries. Press and quickly release the volume up button. (But if it has, you'll need the battery replaced.) If it hasn't internally disconnected yet, that would bring it back. If that still doesn't start it charging, bring the phone into your carrier ("the phone company") and ask them for assistance - they may have a charger that does a precharge, to get it to the point that it can be charged. Updated Mar 3, 2022, 4:31 PM It can be incredibly frustrating when your iPhone wont charge. I suggest that you plug in the charger and leave it plugged in for at least 4 hours before even looking at the phone again. There's a little circuit in most lithium batteries that disconnects the battery from the terminals (internally) if the battery voltage drops too low - and they'd have to go back to the factory to get that reset, which hardly pays, because it would cost you (or Samsung) a few hundred dollars, so it's cheaper to replace the battery. This means using your device until it powers down by its own and the battery level reads 0. (Not charging them past 80% will also prolong their life.) NEVER lett the battery discharge below 25%, but 40% will give you a much longer battery life. (Remember the Note 7s?) Discharging the battery all the way, like that, isn't good for their longevity either - doing it every charge cycle, even if you can recharge them, will kill them in a month or two. Try the following and see if it will turn on. If it is under warranty, then contact the manufacturer first. In such a case, make sure that your phone is not under warranty still before you try opening it up yourself. Lithium batteries that are fully discharged can blow up if they're charged. NOTE: Yes, I know some phone batteries are not so easy to get to, on some devices. Get a small stick to rearrange any misplaced tabs inside the USB port of your phone.
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