As far as I understand concept of unifying battery testing... those data will be fake as any benchmark. We will end with another useless statistic that have nothing to do with reality. In real life phone is speedy and run everything fine, but on benchmark it have 1-4% less numbers in score and people put such device in trash saying its slow. Now we gonna have the same with batteries. In real life phone will last even 2 days of heavy usage, but your automatic test will give it some weird score and people will bash it for no reason.
So no, im not a fan of it. I would prefer real person opinion and test, not plain data that have no use in life.
Haha Samsung, Sony, Nokia and Xiaomi are unveiling something in WMC, why should our fav. GSMArena.com should stay behind? :P