I think I am actually getting BETTER battery life with this hard drive.

it takes 5 Watts for this one (1amp @ 5v) and I think the other one took about 3amps at 5volts (15Watts) so, my battery life has gone UP significantly!

By now, my battery would be dead with the other hard drive. right now, I am sitting at 59% w/ 1:09 hours left 8-o