You can’t literally “turn off” slow charging on an iPhone with a single master switch, but you can disable the main software feature that intentionally slows charging (Optimized Battery Charging) and fix the usual causes of slow charging so it behaves fast again.

What “slow charging” usually is

When people search for how to turn off slow charging on iPhone , it’s usually one of these situations:

  • The phone pauses around 80% and creeps slowly to 100% (that’s Optimized Battery Charging).
  • A newer iOS shows a “Slow Charger” style warning or clearly charges much slower than expected (often underpowered charger/cable).
  • Background activity, heat, or network use is eating power as fast as it charges.

Each of these has a different fix.

Turn off Optimized Battery Charging

If your iPhone charges quickly to about 80% and then crawls to 100%, that’s by design: Apple’s Optimized Battery Charging slows or pauses charging to reduce battery wear based on your daily routine.

To “turn off slow charging” in this sense:

  • Open Settings.
  • Go to Battery → Battery Health & Charging.
  • Tap Charging Optimization / Optimized Battery Charging.
  • Select Off (or “None”) to disable it completely, or choose Turn Off Until Tomorrow if you only want a one‑time fast charge.

This will let your iPhone charge to 100% as fast as the charger allows, but it can shorten long‑term battery lifespan because it removes that protective “slow/hold at 80%” behavior.

Fix “Slow Charger” alerts & genuinely slow charging

If you’re seeing a “slow charger” type alert or your phone just charges painfully slowly all the time, the bottleneck is usually hardware or power, not a setting.

Try these steps:

  1. Use a higher‑watt charger
    • For fast charging, use at least a 20W USB‑C power adapter and a good cable (USB‑C to Lightning for older models, USB‑C to USB‑C for iPhone 15 and newer).
 * Very old or cheap 5W bricks and random cables often trigger slow‑charger behavior and much longer charge times.
  1. Check cable and port
    • Inspect the cable for fraying or loose connectors; swap with an Apple or certified cable to test.
 * Clean the charging port gently (wood/plastic toothpick) to remove lint and dust that can limit power flow.
  1. Reduce phone activity while charging
    • Don’t game or stream while charging; it generates heat and consumes power, which slows net charging.
 * If you need the fastest possible top‑up, either **turn the phone off** or enable **Airplane Mode** while charging.
  1. Watch temperature
    • Charging may slow or pause if the phone gets hot; avoid charging under a pillow, in direct sun, or on top of a laptop.

These steps don’t “flip a switch,” but in practice they remove most of what makes an iPhone feel like it’s stuck in slow‑charge mode.

Mini forum-style take: what users say

On forums and Q&A threads, you see two main viewpoints:

  • Speed-first crowd
    • Often turns off Optimized Battery Charging and buys a 20–30W+ charger to get 0–50% in around 30 minutes.
* Accepts more battery wear in exchange for faster, predictable charging.
  • Longevity-first crowd
    • Leaves Optimized Battery Charging on and tolerates slower overnight charging to keep battery health higher over years.
* Only worries about “slow charging” when it’s extreme or clearly due to bad hardware.

A lot of recent discussion mentions newer iOS versions adding more explicit “Slow Charger” style warnings, which some see as helpful and others find annoying or anxiety‑inducing.

SEO notes (for your post)

If you’re writing content titled “how to turn off slow charging on iPhone” , strong focus points and keywords could be:

  • Explain that “turning off slow charging” mostly means disabling Optimized Battery Charging and using a proper fast charger.
  • Use phrases like “how to turn off slow charging on iPhone” , “iPhone slow charger alert fix” , and “iPhone charging slowly how to speed it up” naturally in headings and short paragraphs.
  • Add brief sections on latest iOS changes , forum discussion reactions , and when it’s better to keep slow charging on for battery health to catch “latest news” and “forum discussion” type searches.

Bottom note idea: “Information gathered from public forums or data available on the internet and portrayed here.” matches how many tech blogs disclose their sources.