The iPhone 11 Pro has a great battery for its size. The battery boasts approximately 10 hours. Of course it depends what you’re doing on your iPhone but the battery on the iPhone 11 Pro will give you a decent amount of juice. If you tend to use your phone more for audio playback and phone calls than internet browsing you can expect more time out of the battery. The iPhone 11 Pro has a 3049 mAh battery. It beats out the iPhone XS battery and is one of the best batteries on an iPhone for its size.
It’s important to note that when you purchase a refurbished iPhone, the battery has likely been slightly depleted but at Frank we guarantee our batteries retain a minimum of 80% of their original capacity (which Apple has declared sufficient for efficient battery performance) 🔋.
Apple's lithium-ion batteries are designed to hold at least 80% of their original capacity for a high number of charge cycles, this will vary depending on the product.