Currently the MHL Cable is the best bet to get onto any HDMI equipped TV. If that TV does not have a USB output to power the adapter (and hence the phone) then I have found taking a portable battery pack that I have serves that purpose well. It’s 5000mAh which is more than enough to keep things going for an evenings films. Plus as it only charges at 500mA (if I use a standard USB cable) instead of the wall charger’s 1A the phone doesn’t get so hot.
However...something to consider if you do
have access to WiFi, and don’t
want to shell out of that HD Media Link....
I was going to buy one myself until I bought my NAS drive. It has a built-in media server called Twonky which my Xbox and PS3 can stream from. Stupid name aside, I wondered if there was an android version.
If (like my friends) they have either an Xbox, PS3 or Windows PC hooked up to the TV, these can (via a WiFi network) stream a move straight off your phone and play on the TV. It works well. Hard to determine the effect on battery drain as I am one of the ones with this WiFi hardware fault, and my battery life in general on WiFi is shocking.