Day 1: Left the phone plugged in via USB to my machine overnight, and verified the phone was still charging when the machine was asleep. So far so good. Woke up, and the phone is showing around 20-25% charge.

Brought the phone and the USB cable to work, and it's sat plugged in for 3 hours, and the battery bar isn't moving at all. I haven't applied any of the power tweaks for the SD card, I wonder if the phone is just spinning and draining the battery now that it has content on it. Going to be hard to test this thing as my daily phone if it can't even hold a charge. Beginning to think it might just be wise to avoid any Samsung phone regardless of the OS, as I'm seeing tons of similar charging complaints even without the SD card.