Will fastboot not proceed with flashing if battery level is below certain percentage? 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&gt;tools\fastboot.exe flash recovery NexusS\kernel\recovery-clockwork-3.0.0.5-crespo.img
&lt; waiting for device &gt;


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 ?
Turns out I was not in fastboot mode :| (yes, terrible mistake). I was able to flash after getting into fastboot mode.