I was using the same tiny white charging cube that came with my iPhone 6. For years. My phone took three hours to charge from dead to full and I thought that was just how long charging took. Then a friend saw my setup and said “You know that is a five-watt charger, right? Your phone can take twenty.”

Your charger is the bottleneck, not your phone. Most modern phones support fast charging of at least 18-20 watts, but the charger in the box (if you even got one) is often a slow 5-watt charger. Get a USB-C Power Delivery (PD) charger of 20 watts or more. Anker, Spigen, and Belkin all make reliable ones for under fifteen dollars. Do not buy the cheapest no-name charger on Amazon — poorly regulated chargers can damage your battery over time.

I switched from a 5W Apple cube to a 20W Anker nano and my charge time dropped from three hours to about ninety minutes. Same phone. Same cable. Different brick.

The Cable Matters Too

Not all USB cables carry the same power. Thin, cheap cables have higher resistance, which means less current reaches your phone. Use the cable that came with your phone or buy a reputable brand. If your cable is frayed or bent near the connectors, replace it — the internal wires are probably damaged and causing resistance you cannot see.

The Temperature Problem

Phones charge fastest between about 30% and 80% battery. Below 30%, the battery management system limits current to protect the cells. Above 80%, it slows down again to prevent overheating. If you need a quick charge, plug in at 30% and stop at 80%.

Also: do not charge your phone under a pillow or in direct sunlight. Heat is the enemy of lithium-ion batteries and they slow charging dramatically when hot. Take the case off if your phone feels warm.

Twenty-watt charger. Good cable. 30-80% sweet spot. Cool environment. Hours of your life back.