|Search the threads, I tried this with my MicroDrive. To maximise stress, I played MPEG video on a MicroDrive in the PCMCIA adapter. Battery lasted 3 hours 50 mins, down from the usual 6 (to even 8) hours. However, I was constantly accessing the drive and MPEG is pretty intensive. Access time is really not important, the ePods itself is the bottleneck.|
In short, yes, it eats power. For me that's OK, the low cost (compared to flash) for the large space was worth it.