I use the Hyperdrive HD80, which is a version behind the current Hyperdrive SPACE model...and haven't had any problems. It uses double AA batteries, which I had several rechargeables already, so it worked out for me. It's not a media viewer, it's strickly for transferring your media card  files to it's harddrive.

Here's the link to get the current version info. It looks like its went through an overhaul...  http://www.hypershop.com.