Excerpt: The PSP520 AC adapter works great on a Tascam DR-100. Batteries on the recorder are pretty durable, but it was great to have AC. Didn't need phantom power this time, but it would have been there if needed. This little product (AC adapter) gave us some security. And all thanks to the timely delivery of a [$]item, ordered on a Friday afternoon. Kudos to B&H.