The battery life of the Apple Pencil (1st Generation) is pretty solid, lasting up to 12 hours on a full charge. If you're ever caught short on battery, just plugging it into your iPad's Lightning port for about 15 seconds will get you roughly 30 minutes of use.
It's a nice little trick when you're out and about and need some extra juice. From our research, it seems the battery life is generally reliable, especially if you keep an eye on charging it regularly. There's a handy indicator that lets you know when the battery's running low, which users appreciate.
Just remember, the battery life might vary depending on how you use the Pencil. For instance, using it for heavy drawing apps might drain the battery faster compared to simpler tasks like taking notes.
Just a heads-up about compatibility—since it's a question that pops up often—the 1st Generation Apple Pencil works with specific iPad models, such as the iPad Air (3rd generation), iPad mini (5th generation), and iPad Pro 12.9-inch (1st & 2nd generation).
However, it won't work with the iPad Air 5 model; for that, you'd need the 2nd Generation Apple Pencil.
All in all, the 1st Generation Apple Pencil hits a nice spot between battery life and quick-charging convenience, making it a decent tool for compatible devices to boost your creative and productive efforts.