I'm trying to re-install Clockwork recovery mod (tl;dr: Android 2.3.1+ will reinstall stock recovery on every boot if it's not present).
I had installed it successfully yesterday, but today it does not go beyond
C:\android>tools\fastboot.exe flash recovery NexusS\kernel\recovery-clockwork-184.108.40.206-crespo.img < waiting for device >
The only difference would be that today the battery level is low ( currently at 20% and charging).
So does fastboot require the battery to be over a set level ?