Micro-USB and Mini-USB can provide only regular charging regardless of a USB-A or USB-C connection. Apple’s Lightning ports can use regular 12-watt charging with a USB-A cable and faster charging via USB-C. We’ve tested dozens of cables and adapters to help you find the right ones for your needs without overspending.Ī quick primer on USB specifications for those living in blissful oblivion: While ordinary USB-A ports are limited to just 12 watts of charging power, USB-C ports can provide 18 watts of fast-charging power to phones and, more rarely, up to 240 watts to laptops (depending on the cable and device you plug into them). Unfortunately, when it comes to USB-C, even cables that look identical can behave very differently-for instance, a cable that charges your phone at top speed might be sluggish at transferring music files, or vice versa. With iPhone 15 models, you may have turned on 80% Limit, which stops your iPhone from charging past around 80 per cent. If you want your iPhone to charge past 80 per cent, you can either turn on Optimised Battery Charging or turn off charging optimisations.If you have a device with a USB-C port-such as most laptops, tablets, game consoles, or phones, including the latest iPhones-you need a cable to charge it and to transfer data to and from other devices. Try moving your iPhone and charger to a cooler location. Your iPhone will charge again when the temperature drops. To extend the lifespan of your battery, if the battery gets too warm, software may limit charging above 80 per cent. Your iPhone may get slightly warmer while it charges. Your iPhone uses on-device machine learning to understand your daily charging routine so it can wait until you need to use your iPhone to finish charging past 80 per cent.* Optimised Battery Charging is only active when your iPhone predicts that it will be connected to a charger for a long period of time. IOS 13 and later use Optimised Battery Charging to slow the rate of battery ageing by reducing the time that your iPhone spends fully charged.
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