First of all, battery power is a no-go for non-portable HDTVs, digital converters & routers/modems/wifi. You would need to have a generator for blackouts if they are regular ocurrences where you live. OTOH a basic small portable TV and small powered antennas will generally work for modest periods on battery (DC) power.
Regarding laptops, the cheap ones generally don't have the best battery life, so that needs to be taken into consideration. You could always pop in a DVD, but such multimedia usage will usually drain the batter quicker than surfing the web or typing an email message. Again, no AC or generator, no wifi/internet access.
Also, when you pick up a digital converter you will want to try someplace like Radio Shack (online is good too) for a small antenna. Keep in mind that externally mounted antennas on top of a structure with line of sight will help you pull in the best signal for OTA (over the air) viewing. Next choice is inside an attic, and after that would be a simply 'rabbit ears' on top of the TV. All of this is not without some trial and error to place the antenna where you can pull in the best picture.
If your TV lacks a coaxial or RCA/video input, you might be able to use a 75Ohm to 300ohm converter if it at least has the two screws visible behind the TV. If not, then you are SOL and need another TV.
Here's a graphic of what to look for:
I have broadband TV & Net. I need help with TV under two distinct situations. (I don?t know who to ask, please help.)
First, I have a TV that has a coax input, and even tho I can?t run a cable line to it, I want to watch TV on it. In the past an antenna would work, but now I guess I need a digital converter &/or special antenna. What can you recommend to me for this? Is there a unit with both antenna AND digital converter together? Something that can be plugged into the wall socket OR battery powered? (Bat. cos of 2nd part
Second, I want something that I can watch, for long periods, during a power outage! I have a portable (bat. operated) TV w/a 3" screen, but it would need a battery operated converter & antenna. (I understand [from YouTube] that the DC kind can be ?hacked? to use batteries.)
Also, is there a television I can buy that runs on both power types (AC & DC), or just batteries, that also has a built-in converter/antenna, with a larger screen ? 7" or so?
The first I need for a TV I?ll watch while on an exercise bike in a room with no cable access. The 2nd, I want for during blackouts ? so it?ll have to have extra batteries; be ?recharged? by AA bats. etc. I was considering a (cheap) laptop ? IF I can watch TV on it. Ex: laptop (w/bat.) + a non-powered antenna (or something). I heard there?s no way to get internet access on a laptop w/o a power source cos WiFi needs DC. IS there a way to get internet on a laptop with just batteries? (WiFi doesn't quite cover my home area.)