Don't need the HEX file. Get the full .bin dump here:First a couldn find the file for the esc even thou i loaded all of the things instructeded
Use that file according to the tutorial.
Then for the battery:
The soldering sometimes doesn't get a good connection, especially if it's not cleaned properly. If you can read the chip, you can program. Go slow, read the instructions - then read them again. It's the little things missed...... :)