Good VoIF, bad, bad accu

Eric Zeman of InformationWeek just posted a brief summary of his in-depth review of WiFi phones and their usage. He lists 5 things everyone has to know before making a decision to opt-in for such a device. There's some disputable points made and, just being optimistic, I'd say there's really just one serious obstacle for adventurous mind wishing to embrace a cutting-edge technology - battery life.
Everyone phone out there have an accumulator so abysmally bad you have to carry its charger with you while making your walk down town. And don't forget to map every available power outlet for future use - you'll need it often!