So, battery life, does the backlit screen suck it like a Gamegear and Atarilynx skateboard edition? Well we tested it with the unbranded korean batteries which are supplied free (and lets be honest are probably the cheapest gamepark could source) and here are the results:
166Mhz with volume level full playing Fgen(beta) with sound on - ~5hours.
66Mhz with volume level full playing Drunken Arcade Master - ~10hours.
I think from this we can assume about 7 hours at 133Mhz, not bad at all, especially considering these times will surely be improved with some decent quality batteries!