The battery life on the PSV is supposed to be kind of bad too.
I actually find the battery to be better than expected, but everybody's opinion on battery life will differ based on expectations and what they use it for.
I charged mine to full yesterday and after unplugging it, tried some remote play to my PS3 over the internet for about 10 minutes to play FFVII. I then handed it over to a co-worker who played it for about 15 minutes. Fast forward to last night after I got home, I put in another 30 minutes in remote play on the PS3. When heading to bed, I played a match in FIFA and then browsed the net on it, in all about 40 minutes worth.
The entire time I wasn't using it, it was in stand-by, not turned off. When I got up this morning, I checked the store to see if it had updated and the battery marker is still at around the 80-85% mark.
The only time I saw the battery drain really fast is when I first got it and 3G was left on. I now keep the 3G and bluetooth turned off at all times, WiFi stays on.
On a side note about the battery, if you're going to charge it from your computer, you need to turn the unit off, it won't charge in stand-by. Hold the power button for two seconds until you get the power off option.