Smartphones with 5,000mAh battery or more are guaranteed to last a long time before needing a re-charge. Based on my experience, these smartphones usually last more than a day on casual usage and 8-10 hours of continuous gaming!
You can get smaller portable batteries with 5,000mAh and 10,000mAh capacities, but those with 20,000mAh will last you longer and should charge your device. Home;
The Apple iPhone X has a battery capacity of 2716mAh. A 10,000mAh power bank has an actual 6,660mAh capacity, so you can expect to charge your iPhone X approximately 2.5 times with one full chargeWith a battery capacity of 6,000mAh, the iWALK PowerGrip Mag can provide more than one charge for many iPhones. MagSafe is standard on all iPhone models from the iPhone 12 and above.
Shadowbech said: Depends on when you start charging it. But since the X is rated to have a design capacity of 2716 MaH (if brand new). I'd say 1 full cycle and 85% of the next cycle. less since the charging and discharging comes with a loss.