Well, if only used occasionally, it won't affect your battery that much. I jumped on the DLNA train a couple months ago and still learning a lot, but AFAIK it's not the holy grail yet, because the clients need to understand the format and codecs used in the video served. I also have a Sony TV with DLNA capabilities, but it only plays MPEG-2, so unless i convert all my movies (no way ), i need to stick with my PS3 (which also pretty much limits the formats, but at least understands m2ts, which takes only a couple of minutes to create from HD movies). Sorry for going a bit off, i just don't want you to get as much disappointed from DLNA as i was