Some users have recently had their accounts hijacked. It seems that the now defunct EVGA forums might have compromised your password there and seems many are using the same PW here. We would suggest you UPDATE YOUR PASSWORD and TURN ON 2FA for your account here to further secure it. None of the compromised accounts had 2FA turned on.
Once you have enabled 2FA, your account will be updated soon to show a badge, letting other members know that you use 2FA to protect your account. This should be beneficial for everyone that uses FSFT.
I bought a long usb cable and an adaptor for my Samsung Galaxy Note, but for some strange reason, while it indicates it charges my phone, the battery level rises veeeery slow
Many devices that you attempt to charge through a USB port on your PC will charge slowly unless the device is in sleep mode or turned off. Apple products are famous for this, but the limitation is due to USB power standards, so all high power usage devices can act similarly.
My advice is to turn the device off if charging through a PC. If you have a wall plug, turn the device off and use that, it should charge within a few hours.