Previous page Next page 1 Cute 2 Wireless 3 20 PD USB-C Why is my power bank providing fewer charges than expected ? The capacity reduction during charging is due to a 20% to 35% energy loss in the battery cells and conversion circuitry. Therefore, a fully charged iWALK mini Portable Charger offers an estimated 2750mAh to 3500mAh to power devices. How many times this power bank will charge my iPhone when fully recharged ? To estimate charges,use this formula: (Power Bank Capacity × 0.66) ÷ Device Battery Capacity. For example, an iPhone 15 with a 3,349mAh battery can receive about 0.88 charges from a 4,500mAh power bank (calculated as (4,500mAh × 0.66) ÷ 3,349mAh). Getting hot when charing, is it normal ? Our portablle chatger support 20W fast charging for your iPhone, which may cause some warmth,please feel free to use it since this power bank has built-in over-heat protection. Why does the device become hot when used ? When the power of the mobile phone or power bank is less than 30%, the power will reach the maximum value and the temperature of the product will rise rapidly and significantly. This is normal. Which iPhone models this will be compatible with iPhone 15,iPhone 15 Plus,15 Pro,15 Pro Max