My first part is no longer being charged after about 10 days.
The replacement device has also no longer being charged after 14 days.
(Charging stations used: EasyCHEE T200 and 2x Andoer PCBA)
The conversion was carried out by returning, reimbursement and reappointment on Amazon and no problems. Thanks Amazon!
The SlimPWRcard is also offered with the following feature: "with full NFC support". I can not confirm, unfortunately. After installation of the Galaxy SlimPWRcard Alpha could not detect NFC tags more. My Samsung TecTiles, therefore the NFC tags from smart phone manufacturers have been easily detected without the card. With the built-in map no longer. According to customer service Fonesalesman one is there not in a position to enable the NFC detection for all current market NFC tags. Moreover, the NFC support is full support for mobile-to-mobile. This feature unfortunately I could not check.
According fonesalesman defective items are very rare and one regrets my misfortune to have calculated get 2 defective items.
I'll return the item back and probably order not regained replacement.