iPhone Displays “Slow charger” Warning: Here’s What You Need to Know
Apple’s iPhone 15 and later models are alerting users to “Slow charger” status when paired with older or less powerful charging adapters. The notification indicates the iPhone isn’t receiving sufficient power for optimal charging speeds,but doesn’t pose a safety risk to the device.This change, stemming from the iPhone 15’s transition to USB-C, highlights the need for updated charging accessories to take full advantage of faster charging capabilities.
Modern iPhones feature significantly larger batteries than older models. Coupled with the move from Lightning to USB-C, many users upgrading to the latest iPhones may not have a compatible fast charger. Older USB-A chargers, with their rectangular ports, are limited to a maximum charging rate of 7.5 watts, and frequently enough deliver only 5 watts. This can result in charging times of three hours or more for an iPhone 15.
To achieve optimal fast charging speeds – sustained between 20 and 30 watts – users need to utilize a USB-C power adapter with Power Delivery. Apple recommends its Dynamic Charger, though the performance difference is minimal. Affordable USB-C fast chargers from brands like Anker and Belkin are also effective. A compatible USB-C cable is also required.
The “Slow Charger” warning can also appear when using Qi wireless charging, particularly with older, first-generation chargers delivering less than 10 watts. For faster wireless charging, look for MagSafe accessories or products branded with the Qi2 standard, supporting speeds up to 25 watts. Examples include the Belkin MagSafe charger (up to 25 watts) and a 15-watt wireless charging pad.
Importantly, using a slower charger won’t damage the iPhone.The ”Slow Charger” notification is primarily a convenience issue; overnight charging with a slower adapter remains perfectly functional.However,for users prioritizing speed,upgrading to a faster wired or wireless charging solution is recommended.
