After traveling this weekend with the new SB and running down the battery a bit on purpose, the keyboard battery will no longer charge. I tried the firmware update today as well and it didn't help. I've been through all of the possible "processes" that I've found online to resolve this issue (uninstalling battery drivers, recycling, hard shutdown, etc). I've also tried the steps around unplugging, flipping the plug, shutting down and charging for 30 minutes, etc. Nothing has improved and it appears I have a dead keyboard battery. Surface battery won’t charge | Battery not detected | Troubleshoot battery After following one of the steps at the link above, my battery 1 and 2 are actually now opposite of MS documentation (Battery 1 tablet and 2 being keyboard). I know this has switched because I can detach the screen and it functions on battery. Regardless, it is obviously receiving power as the screen brightens as soon as it is connected. However, it stays at 0% and "not charging" regardless. Battery 2 will bounce to "in use" from time to time even while plugged in. I've worked with every outlet in my house and office today with the same behavior. Any ideas as I'm about to throw this out of the window as I have a 3 day trip coming up on Wednesday.