Bought a T100 three days ago on 2/16/2014. It had BIOS 220 installed. Charged it up, used it off and on, maybe four hours total. Closed the lid last night with probably 50% battery remaining. Today it wouldn't turn on. Plugged it in and after a while, got
it to come on but battery was completely drained. So it never went to sleep? Pretty sure the screen was off.
ASUS has released three BIOS updates since 220:
1/7/2014: BIOS 223 Remove wake-up function of Windows key when lid closed
2/12/2014:
BIOS 224 Shorten the system boot necessary charging time under low power
2/14/2014:
BIOS 225 Shorten necessary charging time to reboot system under critical battery
Obviously they are still fighting with power issued. I've updated to 225. We'll see if that helps.
Mark