Sanyo phone runs off AA battery

I remember the older Alcatel handsets that run on AA batteries back in the day where NiMH batteries in cellphones ruled the roost. After all, AA batteries are universal so you don’t have to worry about running out of juice at the most inopportune moments. The only problem was the extra weight and ultra long charge times of rechargeable AA batteries. Sanyo brings a tear to my eye by unveiling a prototype cellphone that runs on a single AA battery, offering a phenomenal five hours of talk time and 250 hours of standby time. Do you think that AA-powered handsets will be making a return in the near future, or is this just wishful thinking?