After talking with Alex of Femtoduino.com, I realized some critical errors in the 6.0 design due to the fact that the IMUduinoBTLE regulates to and has a logic level of 3.3v, which isn't enough to charge the lithium battery with. The watch now charges straight from USB in, which is perfect, and while I was there, I enabled the option for another power source to be added such as a wireless inductive charging ring to provide the battery charger with its charging power. The IMUduino has been moved over a bit to allow the watch to go together several mm thinner, and with some more tweaks added here and there, the new revision of the PCB is far superior to the last. After this PCB is manufactured, I'll have a functional and much better equipped smart watch that's thinner and more feature loaded. Here's what it looks like!