1. Turn Off Optimized Battery Charging

Like iPhone, Apple Watch comes equipped with Optimized Battery Charging. Enabled by default, it is designed to extend the longevity of your Apple Watch battery. The feature learns from your usage habits and location and waits to finish the charging to 100% until you need the watch.

For example, suppose you regularly charge the Apple Watch at night and unplug it at 7 in the morning. In that case, it’ll automatically limit the charging to 80 and finish the remaining 20 right before you wake up. This allows the watch to stay at comfortable levels instead of trickle charging at 100, reducing its life.

At times, it may limit the charging to 80% even when you want the watch to charge full- maybe you woke up early, have a flight to catch, or a schedule change. That’s where you can turn off optimized charging to charge the Apple Watch quickly to 100, as shown below:

Step 1: Press the Digital Crown on your Apple Watch to open the app list.

Step 2: Scroll down and select Settings.

Step 3: Scroll down again and click on Battery.

Step 4: Next, tap Battery Health.

Step 5: Turn off the toggle for Optimized Battery Charging at the bottom of this page.

Step 6: If you want your Apple Watch to charge fast all the time without any limitations, select Turn Off. If it’s a temporary thing, select Turn off until tomorrow.

Optimized Charging is available on the following Apple Watches running WatchOS 7 and above:

• Apple Watch Series-3
• Apple Watch Series-4
• Apple Watch Series-5
• Apple Watch Series-6
• Apple Watch SE
• Apple Watch Series-7

There were some handy ways to fix Apple Watch is not charging or is stuck at 80 percent. Turning off optimized charging and charging the watch in a cool environment will fix the issue for most people.