Some good news on GP2X battery life, something that's caused a bit of grief over the years. Some people have reported that it runs out almost at once with alkalines, but the other day I stuck in a pair of Energizers and they kept going strong all through a 40-minute bus journey. Okay, so I was playing games rather than watching videos, but even so it was slightly better than I'd expected.
Maybe I should try a selection of battery brands, but in all honesty I don't think I can be bothered. Rechargeables are still the best bet, except that they run out so suddenly. The red battery light comes on, and you then have at best 10 seconds before everything stops. (The F200 doesn't even have a battery light, probably because it is so useless here!)