so, let me get this straight, for 0.5 kg I get a brick that will let me recharge my inbuilt laptop battery to about HALF the battery capacity...
when a 94 Wh (removable) 'extended' capacity AD 2012, was 0.51kg and would have been TWICE the capacity of my regular (removable) laptop battery and it would have easily power my laptop for about 15-20 hrs. That's progress, eh?