damienhunter writes: Watching a Blu-ray movie in all its high-definition glory on your laptop may finally become an affordable prospect this year. Just don't wander too far from a power outlet. With the Sony-backed HD format emerging victorious from a two-year showdown with Toshiba's HD DVD, many laptop manufacturers are now scrambling to add Blu-ray drives in their desktop and notebook lineups. Next month, Dell will even introduce a sub-$1,000 Blu-ray notebook, according to Brian Zucker, a technology strategist for the company. But the promise of viewing an increasing variety of HD movies on your laptop may be overshadowed by ongoing concerns over the technology's vampiric effect on battery life. Indeed, if the first generation of Blu-ray equipped laptops are any indication, you might not get more than halfway through that movie before running out of juice completely, analysts say.