For best results, use a power adapter with at least 12W output (not included). Magnetic and metal attachments such as cards, keys, and pop grips will interfere with charging.Not compatible with non-magnetic phone cases, such as OtterBox defender cases. Not recommended to use with iPhone 13/12 mini.The magnetic charge provides up to 7.5W maximum power. The portable charger cannot be manually turned off.When the portable charger is charging or discharging, some heat may be generated due to energy loss during transmission. This is a normal occurrence.The charging indicators are located at the bottom of the portable charger. When the battery is fully charged, 4 lights on the left will turn off after 10 minutes, whereas the indicator on the far right will keep flashing.Does not support charging two devices at once. The device that's connected to a cable will be given priority over the device that's being charged wirelessly.5,000 mAh cell capacity provides 0.8 iPhone 13 charges, 0.8 iPhone 13 Pro charges, 0.5 iPhone 13 Pro Max charges, 0.95 iPhone 12 charges, 0.95 iPhone 12 Pro charges, 0.65 iPhone 12 Pro Max charges.