My controller battery (the one on the right) won't take a charge anymore so I ordered a new battery and got what you see on the left. Please note the serial numbers on both batteries. They are the SAME! Presently I am trying to connect with Yuneec and am awaiting their reply.
As mentioned, try to contact the seller for a return. In the meantime, I also had a ST-16S battery that got to where it didn't like to take a charge so I made up a simple charge lead that allows me to charge with an aftermarket charger. I can now charge my batteries at a much faster rate and everything is working fine. You're problem is likely to be the USB cable.
Thank you so much for your quick reply. I am in the process of contacting them now. It would seem that if the part numbers are the same then they should be the same. What else do I have to go on when I order?
Hmm... HiTEC charger. I have to look into that as well. So you are thinking the battery is okay if it is the USB cable? If this is true then I really have to look at alternative charging options. I will look into the cable as well. Is this the Lipo Battery Charter Hitec X4 AC Pro AC/DC 4-port Multi charter?
The part numbers are different for the battery packs, but the internal battery assembly is the same (the YP-3A) the seller should know the difference. Many miss the distinction between the ST-16 and the ST-16S.